# Cat Scratch: When to Worry About Infection or Rabies ## Key Takeaways - Cat scratches can transmit *Bartonella henselae*, the causative agent of cat scratch disease, leading to localized lesions and regional lymphadenopathy, often presenting with fever and fatigue. - Bacterial wound infections, distinct from cat scratch disease, can arise from commensal bacteria like *Staphylococcus* or *Streptococcus* and manifest as acute cellulitis with erythema, warmth, swelling, and purulent discharge within 24-48 hours. - Rabies transmission via a cat scratch is rare and requires direct contact of infectious saliva with the wound; the primary risk factor is exposure to a stray, feral, or unvaccinated cat exhibiting neurological signs. - Prompt and thorough wound irrigation with mild soap and warm running water for at least five minutes is the most critical immediate first-aid measure to reduce bacterial load. - Seek immediate medical attention for signs of systemic infection (fever >100.4°F, spreading red streaks, painful swollen lymph nodes) or if the scratch originates from a potentially rabid animal, as rabies post-exposure prophylaxis is time-sensitive. - Individuals with compromised immune systems, diabetes, or pregnancy should consult a physician for any cat scratch, regardless of initial appearance, due to increased susceptibility to complications. --- A cat scratch can turn from a minor nuisance into a serious problem faster than you might expect. Most scratches heal on their own, but some carry bacteria that cause infection, and in rare cases a scratch raises questions about rabies. You need to know which signs mean act now, which signs mean call your vet today, and which signs mean simple home care is enough. If the scratch came from a stray, feral, or unvaccinated cat, or from any cat that seems sick or behaving oddly, treat it as urgent. If you develop a fever, red streaks spreading from the wound, swollen glands, or the scratch area becomes hot, painful, or oozes pus, seek medical care immediately. These can be signs of a serious bacterial infection called cat scratch disease, and they need prompt treatment. ## Is This an Emergency? Use this table to decide your next step. When in doubt, call your doctor or your local emergency department. A scratch on a person is a human medical issue, so your physician, not your veterinarian, is the one who evaluates infection risk and rabies exposure. ```figure { "type": "triage", "title": "Urgency triage by severity of signs", "tiers": [ { "tier": "danger", "label": "Emergency, go now", "signs": [ "Fever over 100.4°F (38°C), red streaks running up your arm or leg from the scratch, swollen and painful lymph nodes (glands under your jaw, armpit, or groin), the wound is hot to the touch and weeping pus, or you feel confused, very weak, or have trouble breathing" ], "action": [ "Go to an emergency room or urgent care immediately", "Do not wait to see if it improves" ] }, { "tier": "warn", "label": "Same-day appointment", "signs": [ "The scratch area is increasingly red, swollen, or painful more than 24 hours after the injury", "You have a low-grade fever under 100.4°F", "The scratch came from a stray or unvaccinated cat and you are unsure of your rabies vaccine status" ], "action": [ "Call your doctor or local health department today", "They will decide if you need antibiotics or a rabies vaccine series" ] }, { "tier": "safe", "label": "Watch at home", "signs": [ "The scratch is shallow, not bleeding heavily, and you cleaned it within a few hours", "No redness spreading beyond the immediate scratch line", "No fever", "You know the cat is healthy, indoor-only, and up to date on rabies vaccination" ], "action": [ "Clean the wound twice daily with soap and water", "Watch for any change for 7 days", "If redness, pain, or swelling appears, move up to the same-day category" ] } ] } ``` | Urgency Level | Signs You Can See or Feel | What To Do | |---|---|---| | Emergency, go now | Fever over 100.4°F (38°C), red streaks running up your arm or leg from the scratch, swollen and painful lymph nodes (glands under your jaw, armpit, or groin), the wound is hot to the touch and weeping pus, or you feel confused, very weak, or have trouble breathing | Go to an emergency room or urgent care immediately. Do not wait to see if it improves. | | Same-day appointment | The scratch area is increasingly red, swollen, or painful more than 24 hours after the injury. You have a low-grade fever under 100.4°F. The scratch came from a stray or unvaccinated cat and you are unsure of your rabies vaccine status. | Call your doctor or local health department today. They will decide if you need antibiotics or a rabies vaccine series. | | Watch at home | The scratch is shallow, not bleeding heavily, and you cleaned it within a few hours. No redness spreading beyond the immediate scratch line. No fever. You know the cat is healthy, indoor-only, and up to date on rabies vaccination. | Clean the wound twice daily with soap and water. Watch for any change for 7 days. If redness, pain, or swelling appears, move up to the same-day category. | ## What Is Most Likely Going On The vast majority of cat scratches are minor skin injuries. Cats have sharp, thin claws that create narrow puncture wounds and shallow slices. These often bleed a little, then close quickly. The problem is that cat claws carry bacteria from their paws, from the litter box, and from their own mouths when they groom. The most common infection from a cat scratch is cat scratch disease, caused by a bacterium called Bartonella henselae. It does not always cause a problem right away. The scratch may heal, then days later you notice a small bump at the scratch site, followed by swollen lymph nodes. You might feel tired, have a headache, or run a low fever. Most healthy people recover without treatment, but antibiotics can shorten the illness and are often prescribed. The World Small Animal Veterinary Association provides guidance on managing infections and skin health in cats, which is useful context for understanding how bacteria spread between cats and people. ## What Else Could It Be A scratch can also introduce other bacteria, such as Staphylococcus or Streptococcus, which live on cat skin and in the environment. These cause a more typical wound infection: redness, warmth, swelling, and pus at the scratch site within 24 to 48 hours. This type of infection can spread into deeper tissues if ignored, so it needs medical attention. Tetanus is another consideration. Tetanus bacteria live in soil and dirt, and cat claws can carry them. If your tetanus shot is not current, meaning within the last 10 years, a scratch can put you at risk. Your doctor will ask about your vaccination history. ## Rabies Risk: What You Actually Need to Know Rabies is a viral disease that attacks the nervous system and is almost always fatal once symptoms appear. It spreads through the saliva of an infected animal, usually through a bite. A scratch can transmit rabies only if fresh saliva from a rabid cat gets into the wound. A dry claw scratch from a cat with no saliva on its paw does not carry rabies. The real question is whether the cat could have rabies. A healthy, indoor cat that is vaccinated against rabies poses essentially no risk. A stray or feral cat that you cannot observe poses a real risk, because you cannot know its vaccination status or health history. The American Veterinary Medical Association offers guidance on rabies prevention and what to do after an animal exposure. If the cat is a pet, contact its owner and confirm the rabies vaccine is current. If the cat is unknown, contact your local health department immediately. They will help you decide if rabies post-exposure treatment is needed. Do not wait for symptoms. Rabies treatment must begin before symptoms appear. ## First Aid You Can Do Right Now If the scratch is not an emergency, clean it thoroughly. Wash the area with mild soap and warm running water for at least five minutes. This is the single most effective thing you can do to reduce bacteria. Pat it dry with a clean towel, then apply a thin layer of antibiotic ointment and cover with a sterile bandage. Repeat this cleaning once or twice daily for the first two days. Do not squeeze the wound to force bleeding. Do not use hydrogen peroxide or rubbing alcohol, as these can damage tissue and slow healing. Plain soap and water is best. Watch the wound for the next week. If you see any of the emergency signs from the table above, seek care immediately. For the cat's side of the story, keep your own cat's claws trimmed and provide scratching posts so they do not scratch people during play. The American Animal Hospital Association provides resources on preventive care and safe handling of pets, which can help reduce future scratches. If your cat scratches during play, stop the play session immediately and walk away. This teaches the cat that scratching ends interaction. ## What You Can Safely Do at Home Right Now For a minor scratch that is not deep, not bleeding heavily, and not on your face, hands, or joints, you can manage the first minutes yourself. Wash the wound immediately with mild soap and warm running water for at least five minutes. This is the single most effective step you can take to reduce bacteria on the skin. Let the water run over the scratch, do not scrub hard. Pat the area dry with a clean towel and apply light pressure with a clean cloth if it is still oozing. After cleaning, cover the scratch with a sterile adhesive bandage or gauze pad. Keep it dry for the first 24 hours. You can apply a thin layer of plain petroleum jelly to keep the wound moist while it heals, which helps the skin close without forming a thick scab. Do not use antibiotic ointments unless a doctor or veterinarian has told you to, because some people develop contact allergies to them. Watch the wound closely over the next 48 hours. Take a photo of the scratch once a day in the same lighting so you can compare the appearance honestly. Write down the date and time of the scratch, which cat made it, and whether the cat is indoor only, outdoor access, or a stray. This information matters more than you might think. ## What You Must Not Do Do not squeeze the scratch to force blood out. This pushes bacteria deeper into the tissue and increases the chance of infection. Do not soak the wound in a bath, pool, lake, or hot tub. Standing water can introduce new bacteria. Do not apply heat packs directly to the wound. Do not cover a wound that is actively swelling or reddening with a tight bandage, because you need to see the skin clearly. Do not give the cat any medication to prevent infection. Antibiotics for animals are prescription drugs, and the dose must be calculated by a veterinarian based on the cat's weight, kidney function, and the specific bacteria involved. Giving the wrong drug or dose can cause resistance or harm the cat. Do not attempt to test the cat for rabies yourself. Rabies testing requires euthanasia and laboratory examination of brain tissue. There is no blood test for rabies in a living animal. ## What to Write Down Before You Call Before you contact a doctor or veterinarian, gather specific facts. Count the number of separate scratch lines. Measure the longest one in inches or centimeters. Note the color of the skin around each scratch, for example pink, red, or purple. Feel the area with your fingertips and note whether it is warmer than the surrounding skin. Check if the scratch is oozing clear fluid, pus, or blood. Take the cat's temperature if you can do so safely. A normal cat temperature is between 100.5 and 102.5 degrees Fahrenheit. If the cat feels hot, is eating less, is hiding, or is less active than usual, say so. Also note the cat's vaccination status, especially the rabies vaccine. If you do not know whether the cat is vaccinated, say that clearly. For yourself, note whether you have a fever, chills, headache, or swollen lymph nodes. Lymph nodes are small glands you can feel under your jaw, in your armpits, or in your groin. Swelling there can be a sign that an infection is spreading through your body. ## Decision Tree for When to Seek Medical Care Use this table to decide your next step. When in doubt, choose the more urgent option. | Situation | What to Do | |---|---| | Scratch is shallow, less than 1 inch long, no redness, no swelling, no fever | Clean at home, cover, watch for 48 hours | | Scratch becomes red, warm, or swollen within 12 to 48 hours | See a doctor or urgent care the same day | | Redness spreads beyond the scratch line, or you see a red streak moving up your arm or leg | Go to emergency care immediately | | You have a fever, chills, headache, or swollen lymph nodes | See a doctor the same day | | Scratch is on your face, hand, wrist, or over a joint | See a doctor within 24 hours, even if it looks clean | | Scratch is deep, gaping, or from a cat you do not know | See a doctor the same day | | You are pregnant, have diabetes, have a weakened immune system, or take immune-suppressing medication | See a doctor the same day for any cat scratch | | The cat is acting sick, uncoordinated, or aggressive, or is a stray | Contact animal control and a doctor immediately | ## Wound Care Checklist Print this list or save it on your phone. Work through it in order. - [ ] Wash the scratch with soap and warm water for 5 minutes - [ ] Rinse with clean running water - [ ] Pat dry with a clean towel, do not rub - [ ] Apply steady pressure with a clean cloth for 5 minutes if bleeding continues - [ ] Cover with a sterile bandage - [ ] Write down the date, time, and cat's identity - [ ] Note the cat's rabies vaccination status - [ ] Take a photo of the wound - [ ] Check the wound every 6 hours for redness, swelling, warmth, or oozing - [ ] Measure the longest scratch and record the number of scratches - [ ] Take your own temperature twice a day for 48 hours - [ ] Check your lymph nodes daily for swelling - [ ] Replace the bandage daily or whenever it becomes wet or dirty - [ ] Seek medical care if any sign from the decision tree applies ## What a Veterinary Visit Usually Involves If you bring the cat in, the veterinarian will start with a physical examination. They will check the cat's temperature, heart rate, and breathing, and look at the skin around the scratch for signs of infection such as pus, heat, or swelling. They will ask about the cat's vaccine history, whether the cat goes outdoors, and whether the cat has been in a fight recently. The veterinarian may recommend a rabies booster if the cat's vaccination is not current. This is a preventive measure, not a treatment for the scratch itself. The cat may also receive a broad-spectrum antibiotic if there are signs of a skin infection. The specific drug and dose depend on the cat's weight and health, and the veterinarian must determine that. Do not ask for a specific antibiotic by name, because the wrong choice can fail or cause resistance. If the scratch is infected, the veterinarian may take a swab of the wound to culture the bacteria. This test identifies which bacteria are present and which antibiotics will kill them. Results take two to three days. In more serious cases, the cat may need blood work to check for signs of systemic infection. The cost of a veterinary visit varies widely by region and clinic. A basic exam and rabies booster might range from 60 to 150 dollars. Adding a wound culture and antibiotics can bring the total to 150 to 350 dollars. These are general ranges only, not quotes. Call your clinic for their specific pricing. ## When Hands-On Care Is Required This situation always requires hands-on care. A scratch can look minor and still carry bacteria that cause serious illness. Cat scratch disease, caused by the bacteria Bartonella henselae, can produce fever, fatigue, and swollen lymph nodes weeks after the scratch heals. The [American Veterinary Medical Association](https://www.avma.org/resources-tools/pet-owners) advises pet owners to clean any wound from a cat promptly and to seek medical attention if signs of infection develop. The [MSD Veterinary Manual](https://www.msdvetmanual.com/pet-owners) notes that cat scratch disease is a recognized risk from scratches, especially from kittens. No online assessment can replace a doctor looking at the wound and feeling the tissue around it. If you are unsure, go in person. ## Common Mistakes Owners Make Many well-meaning owners do things that make a cat scratch worse. The most common error is waiting to see if a wound "looks bad" before acting. Bacteria multiply quickly, and a scratch that seems minor at noon can be swollen and painful by evening. Treat every scratch promptly, even if it looks superficial. Another frequent mistake is applying antibiotic ointment and then covering the wound with a bandage for days without checking it. Trapped moisture can encourage bacterial growth. Check the wound twice daily, and let it breathe when it is clean and dry. Some owners scrub a scratch aggressively with rubbing alcohol or hydrogen peroxide. This damages healthy tissue and can slow healing. Use mild soap and lukewarm water instead. A dangerous error is assuming an indoor cat cannot transmit infection. Indoor cats can carry bacteria on their claws from litter boxes or from scratching surfaces. Rabies risk is lower for indoor cats, but infection risk is not zero. Finally, owners sometimes delay medical care because they worry about cost or inconvenience. If you see spreading redness, fever, or swollen lymph nodes, those signs require prompt medical attention. Do not wait to see if they improve on their own. | Common Mistake | Better Action | | --- | --- | | Waiting to see if a scratch becomes serious | Clean it immediately and monitor closely for 48 hours | | Using alcohol or hydrogen peroxide | Wash with mild soap and lukewarm water | | Keeping a wound covered and unwashed for days | Check twice daily and keep clean and dry | | Assuming indoor cats are risk-free | Treat all scratches with the same care | | Delaying care due to cost concerns | Call your doctor or clinic for guidance early | ## How to Reduce the Chance of It Happening Again Prevention starts with understanding cat behavior. Cats usually scratch when they feel trapped, startled, or overstimulated. Learn to read your cat's body language. A twitching tail, flattened ears, or dilated pupils can signal that your cat wants space. Stop petting or handling your cat when you see these signs. Keep your cat's nails trimmed. Shorter nails cause less damage if a scratch happens. Your veterinarian or a professional groomer can show you the correct technique. Scratching posts give your cat an appropriate outlet for natural scratching behavior. Place them near areas where your cat already likes to scratch. For households with young children, supervise interactions closely. Teach children not to chase, grab, or corner a cat. Show them how to pet gently and when to leave the cat alone. The American Veterinary Medical Association offers guidance on safe pet interactions for families through their [pet owner resources](https://www.avma.org/resources-tools/pet-owners). Keep your cat's rabies vaccination current. This protects your cat and simplifies decisions if a scratch or bite occurs. Discuss vaccination schedules with your veterinarian. The [American Animal Hospital Association](https://www.aaha.org/for-pet-parents/) provides guidance on preventive care that includes vaccination planning. ## What Recovery and Ongoing Management Usually Look Like Most minor cat scratches heal within 3 to 7 days with proper cleaning. You may notice some redness and slight swelling for the first day or two. This is normal. The wound should gradually look better, not worse. If you receive medical treatment for an infected scratch, your doctor may prescribe antibiotics. You must take the full course exactly as prescribed, even if the wound looks better before you finish. Stopping early can allow the infection to return. Dosing depends on your specific situation, so the prescribing doctor must determine the correct amount and duration. Cat scratch fever, also called cat scratch disease, can take longer to resolve. Swollen lymph nodes may persist for 2 to 4 weeks, and fatigue can linger for several weeks. Most healthy people recover fully without long-term problems. The [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners) notes that recovery times vary based on individual health and the severity of the infection. During recovery, watch for new symptoms. If redness spreads, pain increases, or you develop a fever after starting treatment, contact your doctor. These signs can mean the infection is not responding to treatment and needs reevaluation. ## Frequently Asked Questions **How long after a cat scratch do rabies symptoms appear in humans?** Rabies symptoms in humans typically appear 3 to 12 weeks after exposure, but the range can be wider. The incubation period depends on where the virus entered the body and how much virus was introduced. Wounds on the head or neck tend to produce symptoms faster than wounds on the hands or feet. If you are bitten or scratched by a cat that might have rabies, seek medical advice immediately. Do not wait for symptoms. Once symptoms appear, rabies is almost always fatal, which is why prevention and prompt treatment are critical. **Can I get sick from a scratch that does not bleed?** Yes. Even a scratch that barely breaks the skin can introduce bacteria. The scratch may not bleed much, but the wound still provides a pathway for organizms to enter your body. Clean any scratch that breaks the skin, even if it only shows a faint red line. Watch it for signs of infection just as you would a deeper wound. If the area becomes red, swollen, or painful, seek medical attention. **Should I be worried if my cat is fully vaccinated against rabies?** A current rabies vaccination in your cat greatly reduces the risk of rabies transmission. However, no vaccine is 100 percent effective, and you cannot always be certain the vaccination was given correctly or on schedule. If you are scratched by a vaccinated cat that is healthy and indoors, the rabies risk is very low. If the cat is outdoors, unvaccinated, or behaving strangely, contact your doctor or local health department for guidance. **What does cat scratch fever feel like?** Cat scratch fever often begins with a small bump or blister at the scratch site. Within 1 to 3 weeks, you may develop fever, headache, fatigue, and poor appetite. The most distinctive sign is swollen, tender lymph nodes near the scratch, such as in the armpit or neck. These nodes can be quite painful. If you have these symptoms after a cat scratch, see a doctor. The condition is treatable, but it needs proper diagnosis. **Can I treat an infected cat scratch at home?** No. If you suspect an infection, you need medical evaluation. Home treatment cannot determine whether the infection is bacterial, how deep it goes, or whether it has spread. A doctor can examine the wound, decide if antibiotics are needed, and prescribe the correct medication. Trying to manage an infected scratch at home risks delaying effective treatment and allowing the infection to worsen. **Is it safe to ignore a scratch from a kitten?** No. Kitten scratches deserve the same attention as adult cat scratches. Kittens scratch more often during play and may carry the same bacteria on their claws. Their small teeth and claws can create puncture wounds that seal over quickly, trapping bacteria inside. Clean the scratch thoroughly and monitor it closely. If you see any signs of infection, seek medical care promptly. ## Related Clinical & Scientific Guides * [Dog Ear Infection with Discharge: What the Color Tells You](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-ear-infection-with-discharge-what-the-color-tells-you) * [Cat Prednisolone for Allergies: Side Effects and Safe Use](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-prednisolone-allergies) * [Dog Hair Loss on Nose: Causes and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-hair-loss-on-nose-causes-and-when-to-worry) ## References and Further Reading - [WSAVA Global Dermatology Resources](https://wsava.org/global-guidelines/) - [AVMA Pet Owner Resources](https://www.avma.org/resources-tools/pet-owners) - [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners) - [AAHA Pet Owner Resources](https://www.aaha.org/for-pet-parents/) ## Related Articles - [Cat Ear Infection with Lethargy: When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-ear-infection-with-lethargy-when-to-worry) - [Cat Ear Infection with Swelling: What to Do and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-ear-infection-swelling-worry) - [Cat Ear Infection with Redness: Causes and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-ear-infection-with-redness-causes-and-when-to-worry) - [Cat Skin Rash with Swelling: When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-skin-rash-with-swelling) - [Cat Stung by Bee: What to Do and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-stung-by-bee) > This article is general educational information for pet owners. It is not a substitute for veterinary diagnosis, examination, or treatment. If your pet is showing severe or rapidly worsening signs, contact an emergency veterinary hospital immediately.