# Cat Stitches Not Dissolved? What Absorbable Sutures Do Absorbable sutures do not vanish on a fixed schedule. They slowly lose strength and break down over weeks to months, and a small piece can stay visible at the skin surface long after the wound has healed. Seeing a stitch on your cat weeks after surgery is often normal, but it depends on the suture type, the surgery, and how the incision looks. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Absorbable sutures dissolve by losing tensile strength first, then mass. The wound is usually sealed long before the thread is gone. - Most skin sutures used in cats are chosen to hold for about 2 to 4 weeks, which matches typical healing times. A perineal urethrostomy site in cats was healed within 2 weeks when closed with absorbable polydioxanone [1]. - A visible stitch at the surface is common with buried intradermal patterns. Exposed or unburied knots can slow incisional healing, so technique matters [2]. - Never pull, cut, or tug a stitch yourself. You can open a healed incision or introduce infection. - Call your vet if you see redness, swelling, discharge, a gap in the incision, or if your cat is licking or chewing at the site. ## How Long Do Absorbable Sutures Take to Dissolve in Cats? Absorbable suture materials are designed to hold tissue together while the body builds its own scar tissue. They break down through hydrolysis (water slowly attacks the polymer) or through enzymes and cells. The timeline has two parts: how long the suture keeps its strength, and how long until the material is fully absorbed. Strength loss usually happens first. A suture may keep a wound closed for 2 to 4 weeks and then lose most of its holding power, even though you can still see or feel the thread. Full absorption can take several months, and the exact time depends on the material, the suture size, the tissue it sits in, and your cat's individual healing response. One practical example comes from feline surgery. In 18 cats having perineal urethrostomy, closure with absorbable polydioxanone (4-0 or 5-0) resulted in a healed surgical site within 2 weeks in all cats, and none developed a stricture afterward [1]. That study looked at healing, not at exactly when the suture disappeared. It shows the important point: the wound can be fully closed and safe while suture material is still present. Different absorbable materials behave differently. In a study of skin incisions in pigs closed with two absorbable materials, glycomer 631 and lactomer 9-1, researchers scored tissue reaction at days 7 and 14 and examined the tissue under a microscope at day 14 [3]. This kind of research helps veterinarians choose a suture that balances strength and tissue reaction, but it does not give a single universal dissolve date for every cat. ## Why You Might Still See a Stitch ### Buried sutures can work their way to the surface Many veterinarians close cat skin with a buried intradermal pattern. The stitch runs just under the skin surface, and the knots are tucked under the tissue. If a knot is not buried well, it can poke through or sit at the surface. Exposed or unburied knots may impede incisional healing, and proper knot burial helps the incision heal by primary intention [2]. ### The suture is dissolving unevenly Absorbable sutures do not dissolve like a sugar cube in water. They break down in stages, and small fragments can remain visible at the skin. A tiny piece near the surface may look like a stiff thread or a small knot. This is often the last remnant of a suture that has already done its job. ### The incision is healing over the stitch Sometimes the skin closes over the suture, and the stitch stays trapped just beneath the surface. It may feel like a small bump. Over time, the body usually breaks it down or pushes it out. If the bump is red, painful, or draining, that is a different situation and needs a veterinary exam. ### Your cat had a different closure method Not every cat surgery uses absorbable skin sutures. Some incisions are closed with surgical staples, skin glue, or nonabsorbable sutures that must be removed. If you are not sure what was used, check your discharge instructions or call the clinic. Knowing the closure type tells you whether a visible stitch is expected or whether it should have been removed already. ## Step-by-Step: What to Do About a Lingering Stitch 1. **Look at the whole incision, not just the stitch.** Check for redness, swelling, warmth, discharge, a bad smell, or any gap between the skin edges. A single visible stitch with a flat, dry, closed incision is usually not an emergency. 2. **Take a photo in good light.** A photo helps your veterinarian decide whether you need to come in. Take one straight-on view and one from the side. 3. **Do not pull, cut, or trim the stitch.** Pulling can reopen the incision or leave a piece of suture under the skin that acts like a foreign body. 4. **Prevent licking and chewing.** A cone (Elizabethan collar) or a recovery suit keeps your cat away from the incision. Licking is a common cause of irritation and infection after surgery. 5. **Keep the area clean and dry.** Follow your clinic's instructions. If your veterinarian approves gentle cleaning, use only what they recommend. For general wound first aid guidance, see [How to Safely Clean a Cat's Wound at Home: First Aid Steps](/knowledge/veterinary-medicine/vet-visit-decisions/how-to-safely-clean-cats-wound-at-home). 6. **Check the incision daily.** Do this at the same time each day so you notice small changes. A written log or daily photo can help. 7. **Call your veterinarian if anything changes.** Redness that spreads, swelling that grows, discharge, or a gap in the incision means your cat needs to be seen. If your cat had a spay, the recovery instructions overlap with general post-surgical care. For more detail, see [Cat Spay Recovery](/knowledge/veterinary-medicine/preventive-care/cat-spay-recovery) and [Post-Spay and Post-Neuter Care for Dogs and Cats](/knowledge/veterinary-medicine/preventive-care/post-spay-neuter-care-dogs-cats). ## Healing and Suture Timeline Checklist | Time After Surgery | What Is Usually Happening | What You Should Do | |---|---|---| | First 24 to 48 hours | Incision edges are sealed by a clot. Suture is at full strength. | Keep your cat calm and confined. Check the incision once or twice. | | Days 3 to 7 | Early healing. Suture still holds most of its strength. | Check daily for redness, swelling, or discharge. Prevent licking. | | Days 7 to 14 | Wound strength is building. Many incisions look closed. Suture may start losing strength. | Keep using the cone if your cat licks. Call your vet about any swelling. | | Weeks 2 to 4 | Most skin incisions are healed. Suture may still be visible. | Ask your vet if a visible stitch needs attention. Do not pull it. | | Weeks 4 to 12+ | Suture continues to break down and absorb. Small fragments may remain. | Routine monitoring. Report any new bump, drainage, or pain. | This table is a general guide. Your veterinarian sets the actual timeline for your cat based on the surgery, the suture material, and your cat's health. ## Signs That Something Is Wrong A lingering stitch by itself is often harmless. The problem is not the thread. The problem is what the thread might be doing to the tissue around it. Call your veterinarian if you see: - **Redness that is spreading** beyond the incision line - **Swelling that is getting bigger** instead of smaller - **Discharge** that is cloudy, yellow, green, bloody, or smelly - **A gap in the incision** where the skin edges have separated - **A bad odor** from the surgical site - **Pain** when you touch near the incision, or your cat flinching, hiding, or growling - **Fever or lethargy** with poor appetite - **A stitch that is poking out and causing bleeding** or catching on surfaces - **A firm, growing lump** at the incision - **Your cat licking, chewing, or scratching** at the site Suture reactions can happen. In human perineotomy patients, a subcuticular suture technique was associated with a lower rate of catgut suture reaction and secondary suturing compared with a routine technique (9% versus 7.5% lower in the research group) [4]. That study was in women, not cats, so it does not set a rule for your pet. It does show that suture technique and suture material can affect how tissue reacts. If the incision looks infected, your veterinarian may need to examine it, clean it, and possibly prescribe antibiotics. Never use leftover antibiotics or human antibiotic ointments on your cat without veterinary direction. Some products are toxic to cats if ingested during grooming. ## Common Mistakes Owners Make **Pulling a loose stitch.** This is the most common mistake. A stitch that is still attached may be holding deeper tissue. Pulling it can open the incision or leave a fragment behind. **Assuming all stitches dissolve at the same speed.** They do not. Material, size, location, and your cat's tissue response all matter. A stitch in the mouth may behave differently from a stitch in the skin. In a study of cats having full-mouth extractions, oral incisions were closed with absorbable suture, and healing was assessed at 2 and 4 weeks [5]. The study focused on closure time and healing, not on a universal dissolve date. **Skipping the cone because the incision looks fine.** Cats can lick a healing incision without you noticing. Licking causes moisture, bacteria, and friction, which can turn a minor irritation into an infection. **Using hydrogen peroxide or alcohol.** These can damage healing tissue and delay closure. Use only what your veterinarian recommends. **Waiting too long to call.** If you are unsure, call. A quick phone call or photo can save you a costly emergency visit. **Letting your cat jump and run too soon.** Strenuous activity can pull on the incision and the suture line. Follow your clinic's activity restrictions. ## Supplies and Setup That Help You do not need a complicated setup. A few basics make monitoring easier and safer. - **A cone or recovery suit.** Your veterinarian will tell you which is best for the surgery. Keep it on as directed, even if your cat seems calm. - **Good lighting.** Use a lamp or your phone flashlight to check the incision. Shadows hide redness and discharge. - **Clean hands.** Wash your hands before and after checking the incision. - **A daily photo.** Take one photo each day at the same angle. This makes small changes obvious. - **A quiet, confined space.** A bathroom, large crate, or small room limits jumping and keeps your cat away from stairs. - **Fresh litter and a clean box.** Dirty litter increases the risk of contamination, especially for incisions near the rear end. - **Your clinic's phone number and after-hours instructions.** Know who to call at night or on a weekend. If your cat needs fluids or other home care after surgery, your veterinary team will show you how. For a related skill, see [How to Give Your Cat Subcutaneous Fluid Injections at Home](/knowledge/veterinary-medicine/senior-and-chronic-care/give-cat-subcutaneous-fluids-home). ## Limitations and When to Contact a Veterinarian This article cannot tell you whether your cat's specific stitch is normal. Only your veterinarian can examine the incision, review the surgery notes, and decide if the stitch needs to be removed or left alone. Individual cases need a veterinarian. **Contact your veterinarian the same day if you see:** - Redness, swelling, or warmth that is getting worse - Any discharge from the incision - A gap between the skin edges - A stitch that is poking out and bleeding - Your cat licking or chewing at the site despite the cone - A bad smell - Your cat seems painful when moving or being touched **Go to an emergency clinic now if you see:** - Heavy bleeding from the incision - The incision has opened widely and tissue is visible - Your cat is straining to urinate, cannot urinate, or has not urinated in many hours (this is an emergency, especially after urinary surgery) - Your cat is collapsed, having trouble breathing, or unresponsive - Your cat has a high fever, severe lethargy, or is not eating or drinking at all **Schedule a routine visit if:** - A stitch is still visible after the expected healing window and you are not sure if it should be there - You feel a small bump under the skin that is not red or painful - Your cat had nonabsorbable sutures or staples and the removal appointment was missed - You have any question about the incision that a photo cannot answer ## Frequently Asked Questions ### How long does it take for cat stitches to dissolve? It depends on the suture material and the tissue. Most absorbable sutures lose their holding strength over about 2 to 4 weeks, then break down over the following weeks to months. A feline surgical site closed with absorbable polydioxanone was healed within 2 weeks in one study, even though the suture material was still present [1]. ### Is it normal to see a stitch weeks after surgery? Yes, it can be normal. Buried intradermal sutures sometimes work their way to the surface, and small fragments can remain visible after the wound has healed. Exposed or unburied knots may slow healing, so it is worth having your veterinarian look at any stitch that is poking out [2]. ### Should I pull out a stitch that has not dissolved? No. Do not pull, cut, or trim the stitch yourself. You could reopen the incision, cause bleeding, or leave a piece of suture under the skin. Call your veterinarian and let them decide whether it needs to be removed. ### What does a suture reaction look like in a cat? A suture reaction can look like redness, swelling, a firm bump, or drainage at the incision. Some cats develop a small area of irritation around the suture material. If the area is red, painful, or draining, your cat needs a veterinary exam. ### Can I use human antibiotic ointment on my cat's incision? No, not without veterinary approval. Some human ointments contain ingredients that are toxic to cats if they lick them off. Your veterinarian can recommend a safe product or tell you to keep the area clean and dry instead. ### When should I call the vet about a lingering stitch? Call if the stitch is causing redness, swelling, discharge, bleeding, or pain, or if the incision has opened. Call if your cat is licking or chewing at the site. If you are unsure, a photo and a phone call are a good first step. ## Related Articles - [Post-Spay and Post-Neuter Care for Dogs and Cats](/knowledge/veterinary-medicine/preventive-care/post-spay-neuter-care-dogs-cats) - [Cat Spay Recovery](/knowledge/veterinary-medicine/preventive-care/cat-spay-recovery) - [How to Give Your Cat Subcutaneous Fluid Injections at Home](/knowledge/veterinary-medicine/senior-and-chronic-care/give-cat-subcutaneous-fluids-home) - [How to Safely Clean a Cat's Wound at Home: First Aid Steps](/knowledge/veterinary-medicine/vet-visit-decisions/how-to-safely-clean-cats-wound-at-home) - [Radiographic Assessment of Fracture Healing in Dogs and Cats](/knowledge/veterinary-medicine/diagnostic-imaging/radiographic-assessment-fracture-healing-dogs-cats) - [Cat Lethargy](/knowledge/veterinary-medicine/symptom-guides/cat-lethargy) - [Cat Stitches Healing Time: Stages and What to Watch For](/knowledge/veterinary-medicine/preventive-and-routine-care/cat-stitches-healing-time) - [Cat Stitches Bleeding or Infected: What to Do After Surgery](/knowledge/veterinary-medicine/emergency-and-first-aid/cat-stitches-bleeding-infected) - [Cat Stitches Oozing: Normal Discharge or Infection?](/knowledge/veterinary-medicine/emergency-and-first-aid/cat-stitches-oozing) ## References 1. [A simple continuous pattern using absorbable suture for perineal urethrostomy in the cat: 18 cases (2000-2002)](https://pubmed.ncbi.nlm.nih.gov/15533968/). Journal of the American Animal Hospital Association, 2004. 2. [Six tips to improve apposition of the buried horizontal continuous intradermal suture pattern for skin closure in dogs and cats](https://pubmed.ncbi.nlm.nih.gov/41547031/). Journal of the American Veterinary Medical Association, 2026. 3. [Clinical and histologic tissue responses of skin incisions closed with glycomer 631 and lactomer 9-1 using a subcuticular technique in pigs](https://pubmed.ncbi.nlm.nih.gov/32160877/). BMC veterinary research, 2020. 4. [Study of subcuticular suture skill for perineotomy and catgut-suture reaction](https://pubmed.ncbi.nlm.nih.gov/8631101/). Zhonghua hu li za zhi = Chinese journal of nursing, 1995. 5. [Comparison of Knotless Barbed Suture Versus Monofilament Suture in the Oral Cavity of Cats](https://pubmed.ncbi.nlm.nih.gov/28635369/). Journal of veterinary dentistry, 2017. ## Further Reading - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)