Dog Throwing Up and Quivering: Causes and Next Steps
By Dr. Zubair Khalid, DVM, MS, PhD ·
Vomiting and quivering together usually mean your dog feels sick, is in pain, or has been exposed to something toxic. The shaking is often part of the nausea response, but it can also point to a serious problem that needs care right away. This article is educational and is not a substitute for veterinary diagnosis or treatment.
Quick Answer
- Occasional vomiting with mild trembling can happen with simple stomach upset, but repeated vomiting with shaking needs a veterinary call.
- Trembling during or after vomiting is often part of nausea, which can include drooling, retching, and belly contractions [1].
- A hard, swollen belly with unproductive retching and trembling is an emergency. This can be bloat, which is life threatening.
- If you suspect your dog ate a toxin, medication, or garbage, call your veterinarian or a pet poison hotline right away.
- Never give human anti nausea drugs or force food and water on a dog that keeps vomiting.
What Dog Throwing Up and Quivering Looks Like
Vomiting is the forceful ejection of stomach and upper small intestine contents. It usually comes with warning signs first, such as nausea, heavy drooling, retching, and strong contractions of the belly and diaphragm [1]. That whole sequence can leave a dog shaky and tense.
Quivering, trembling, or shaking during and after vomiting is common. Some dogs shiver from the physical effort. Others tremble because nausea itself is distressing. Pain can also cause trembling, especially belly pain.
It helps to know the difference between vomiting and regurgitation. Regurgitation is passive. Food or fluid slides up without effort or belly contractions, and the material often looks undigested and tube shaped [1]. Regurgitation is more often linked to coughing or breathing trouble than to nausea [1]. If your dog is shaking and bringing up food, look closely at whether there was real retching first.
Main Causes of Vomiting With Quivering
Many different problems can cause this combination. The table below groups the most common ones and how urgent they tend to be.
| Cause | Typical clues | How urgent |
|---|---|---|
| Simple stomach upset (dietary indiscretion, mild gastroenteritis) | One or two vomits, mild trembling, dog still alert and interested in you | Monitor closely, call your vet if it continues past a day |
| Nausea from many illnesses | Drooling, lip licking, retching, shaking during episodes [1] | Same day call if repeated |
| Pain (belly pain, pancreatitis, foreign body) | Hunched posture, tense belly, whining, reluctance to move | Same day, emergency if severe |
| Toxin or poison exposure | Sudden vomiting, tremors, drooling, wobbliness, known or suspected ingestion | Emergency now |
| Tremorgenic mycotoxicosis (moldy food or compost) | Acute generalized tremors, often with vomiting, after eating moldy material [2] | Emergency now |
| Bloat (gastric dilatation and volvulus) | Hard swollen belly, unproductive retching, restlessness, trembling | Emergency now |
| Organ disease (kidney or liver failure) | Long term or repeated vomiting, weight loss, weakness, dehydration [1] | Same day to urgent |
| Nervous system disorders | Vomiting with tremors, head tilt, or other neurologic signs [1] | Emergency now |
| Recent vaccination in a young dog | Vomiting, vocalization, abdominal discomfort in the days after a shot [3] | Call your vet, most cases are managed supportively |
| Tick paralysis (in affected regions) | Vomiting or regurgitation with weakness or breathing changes [4] | Emergency now |
Vomiting can be caused by digestive disease, kidney or liver failure, pancreatitis, nervous system disorders, and ingestion of irritating substances or poisons [1]. That is a wide list, which is why the pattern and the other signs matter so much.
When Trembling Points to Nausea
Nausea is a common reason a dog quivers after throwing up. The retching, drooling, and belly contractions that come with vomiting are all part of the nausea response [1]. If your dog vomits, then shakes, drools, and licks their lips for a few minutes, nausea is a likely explanation. This is uncomfortable but not always dangerous on its own.
When Trembling Points to Pain
Pain can make a dog tremble, pant, and hold the belly tense. A dog with belly pain may stand hunched, refuse to lie down, or yelp when picked up. Pancreatitis and intestinal blockage are two examples that cause vomiting with pain. A young dog with a known foreign body ingestion can also develop serious complications after surgery, including liver lobe torsion, which causes lethargy and acute vomiting [5]. Pain related trembling deserves a same day call.
When Trembling Points to a Toxin
Some toxins cause vomiting and tremors together. Tremorgenic mycotoxicosis is a recognized cause of sudden neurotoxicosis in dogs, most often linked to penitrem A, which is mainly produced by Penicillium crustosum [2]. In documented cases, dogs came in with acute generalized tremors, and testing confirmed the toxin in stomach contents and serum [2]. Moldy food, compost, and spoiled items are common sources. If you think your dog ate something moldy, treat it as an emergency.
When Trembling Points to Bloat
Bloat is the emergency that owners fear most, and rightly so. The classic picture is a dog that tries to vomit but brings nothing up, has a belly that looks or feels swollen and tight, paces, drools, and trembles. This is not simple nausea. It needs immediate veterinary care. Do not wait to see if it passes.
Red Flags That Mean Emergency
Call an emergency clinic now if you see any of these:
- A distended, hard, or painful belly with unproductive retching
- Repeated vomiting that will not stop
- Tremors that are getting worse or affecting the whole body
- Known or suspected toxin, medication, or moldy food ingestion
- Collapse, weakness, pale gums, or trouble breathing
- Vomiting with a fever, severe pain, or a dog that cannot get comfortable
- Vomiting after a known foreign body ingestion
- Vomiting with neurologic signs such as head tilt, circling, or seizures
Long term or repeated vomiting can lead to weakness, lethargy, weight loss, dehydration, and electrolyte imbalance [1]. Those problems build up quietly, so a dog that seems only mildly off can decline over a day or two.
What You Can Safely Do at Home
Home care is limited, and that is on purpose. The goal is to keep your dog comfortable and avoid making things worse while you decide on veterinary care.
- Remove food and water for a short time if your dog is actively vomiting. Offer small amounts of water again once the vomiting settles.
- Do not force your dog to eat. A nauseated dog that is made to eat often vomits again.
- Do not give human medications such as anti nausea drugs or pain relievers. Some are toxic to dogs, and dosing is not something you can guess.
- Keep your dog warm and quiet. Trembling can be partly from feeling cold or stressed.
- Collect a sample of the vomit if you can, and note the time, contents, and how many episodes occurred. This helps your veterinarian.
- Write down everything your dog may have eaten, including trash, plants, medications, and moldy food.
If you are wondering whether you should make your dog vomit after a possible poisoning, do not do this on your own. Inducing vomiting is a medical procedure, and in dogs it is typically done with an injected medication under veterinary supervision [6]. The decision depends on what was eaten, how long ago, and your dog's health. Read more about this in How Do I Make My Dog Throw Up.
If the vomiting started right after your dog drank a large amount of water, that pattern has its own causes and is covered in Dog Vomiting After Drinking Water: Causes and Next Steps.
If your dog is shaking and vomiting and you are trying to decide whether to go to the emergency room, Dog Shaking and Vomiting: Emergency or Not? walks through that decision.
What Your Veterinarian Will Check
Your veterinarian will start with a full history. They will ask when the vomiting started, how often it happens, what it looks like, whether there is retching, and what your dog may have eaten. They will also ask about trembling, drooling, energy level, and bowel movements.
The physical exam focuses on hydration, belly pain, belly size, heart rate, gum color, and neurologic signs such as tremors or balance problems. Your vet may check for ticks if you live in or have traveled to an area where tick paralysis occurs, since vomiting and regurgitation have been reported in dogs with tick paralysis and are linked to breathing problems and survival outcomes [4].
Testing often includes blood work to check organ function and electrolytes, and imaging such as X-rays or ultrasound to look for foreign bodies, bloat, or organ changes. In some cases, more advanced testing is needed. A dog with persistent daily vomiting that does not respond to standard anti nausea drugs may need a broad workup, including blood tests, imaging, endoscopy, and even brain imaging, to rule out gastrointestinal, metabolic, and neurologic causes [7].
Treatment depends on the cause. Whenever possible, vomiting is controlled by finding and removing the cause while giving the digestive system time to recover [1]. Supportive care may include fluids, anti nausea medication, pain control, and a bland diet once your dog can keep food down. Your veterinarian calculates any medication dose from your dog's weight and health, so never use a dose from the internet or from a previous prescription for a different problem.
Prevention and Monitoring
You cannot prevent every cause of vomiting, but you can lower the risk.
- Keep trash, compost, moldy food, and spoiled items out of reach. Moldy material is a known source of tremorgenic toxins [2].
- Store medications, human foods, and household chemicals securely.
- Feed a consistent diet and avoid sudden changes.
- Use tick prevention and check your dog for ticks after time outdoors in risk areas [4].
- Keep up with routine veterinary visits so organ disease is caught early.
- After any vomiting episode, watch for trembling, drooling, belly pain, and changes in energy for the next 24 hours.
If your dog has repeated episodes of vomiting that follow a pattern, keep a log with dates, times, and triggers. Cyclic vomiting syndrome is a recognized condition in people, and a 2025 report described the first suspected case in a dog, where episodes followed a stereotyped pattern and did not respond to standard anti nausea drugs [7]. This is still poorly understood in dogs, so a detailed log can help your veterinarian.
Limitations and When to Contact a Veterinarian
This article cannot tell you what is wrong with your dog. Only a veterinarian who examines your dog can do that. Individual cases need a veterinarian, and the timing below is a general guide.
Contact your veterinarian the same day if your dog vomited more than once, is trembling, seems painful, is quieter than usual, or has a known dietary indiscretion.
Go to an emergency clinic now if your dog has a swollen or hard belly, unproductive retching, worsening tremors, collapse, trouble breathing, pale gums, or a suspected toxin exposure.
Schedule a routine visit if your dog has occasional mild vomiting with no other signs, but mention it at the next appointment so it can be tracked.
Frequently Asked Questions
Why is my dog shaking after throwing up?
Shaking after vomiting is often part of the nausea response. Retching, drooling, and belly contractions are all signs that come with vomiting, and the physical effort plus the feeling of nausea can leave a dog trembling [1]. If the shaking is severe, lasts a long time, or comes with a swollen belly or worsening weakness, treat it as an emergency.
Can vomiting and trembling mean my dog is in pain?
Yes, pain is a common reason for this combination. Belly pain from pancreatitis, a foreign body, or another abdominal problem can make a dog tremble, pant, and hold the belly tense. A dog in pain often stands hunched, refuses to lie down, or reacts when you touch the belly. Pain that comes with vomiting deserves a same day veterinary visit.
What if my dog ate something moldy and is now shaking and vomiting?
This is an emergency. Tremorgenic mycotoxicosis is a recognized cause of sudden neurotoxicosis in dogs, most often linked to penitrem A from Penicillium crustosum, and affected dogs present with acute generalized tremors [2]. Bring the packaging or a sample of the moldy material with you if you can, and go to a veterinary clinic right away.
Should I give my dog anti nausea medicine at home?
No. Do not give human anti nausea drugs or leftover pet medications without veterinary guidance. The right drug and dose depend on the cause, your dog's weight, and other health conditions, and your veterinarian sets that dose for your pet. Giving the wrong medication can hide serious signs or cause harm.
How long can I wait before calling the vet?
Call the same day if your dog vomits more than once, is trembling, or seems painful. Go to an emergency clinic immediately for a swollen belly, unproductive retching, worsening tremors, collapse, breathing trouble, or a suspected poisoning. Do not wait overnight on any of those signs.
Related Articles
- Dog Shaking Trembling And Vomiting
- Dog Vomiting After Drinking Water: Causes and Next Steps
- How Do I Make My Dog Throw Up
- Dog Shaking and Vomiting: Emergency or Not?
- Why Is My Dog Throwing Up After Taking Medicine?
- Why Is My Dog Throwing Up Yellow Bile? Causes and Next Steps
- Why Is My Dog Quivering? Causes of Tremors and Shaking
- Why Is My Dog Throwing Up? Causes and When to Worry
- Dog Vomiting and Lethargic: When It Is an Emergency
References
- Vomiting in Dogs - Dog Owners. Merck Veterinary Manual.
- Five cases of tremorgenic mycotoxicosis in dogs - clinical aspects and analytical methods. Veterinary research communications, 2026.
- Transient marked reactive lymphocytosis in a puppy suspected to be secondary to recent vaccination. The Journal of small animal practice, 2026.
- Prevalence and significance of vomiting and regurgitation in dogs with tick paralysis caused by Ixodes holocylus. Australian veterinary journal, 2025.
- Liver Lobe Torsion Following an Enterotomy for an Obstructive Foreign Body in a Puppy. Veterinary medicine and science, 2025.
- Inducing emesis in Australian dogs and cats: agents, adverse effects and antiemetic administration. Australian veterinary journal, 2025.
- Diagnosis and management of presumptive cyclic vomiting syndrome in a dog: first report in veterinary medicine. BMC veterinary research, 2025.