It’s upsetting to see your dog drooling excessively and struggling to pass stool. These two symptoms might seem unrelated, but together they can indicate a serious underlying issue.
We outline the common causes of a dog drooling and being constipated, what you can do at home, and when to seek veterinary help.
Dog Drooling and Constipated — Why It Happens
Excessive drooling and constipation in dogs often occur due to digestive distress, ingestion of foreign objects, neurological problems, or medication side effects.
When a dog is constipated, discomfort in the abdomen can trigger nausea and hypersalivation.
Similarly, issues like anal gland impaction or a painful spinal condition can cause both reduced bowel movement and excessive drool. These signs can also suggest more serious issues like toxin ingestion or a blockage in the intestines.
Dog Drooling and Constipated: Common Causes
Ingesting Foreign Objects
Dogs are naturally curious and sometimes swallow non-food items like socks, bones, or toys. These foreign objects can become lodged in the intestines and cause an obstruction.
When this happens, the dog may strain to defecate without success. Drooling begins as the digestive tract becomes backed up, often accompanied by nausea. You may also see vomiting, restlessness, or a hunched posture.
A blockage is a serious medical emergency. Without prompt care, it can lead to severe dehydration, tissue death, and even death.
Read more: Dog Drooling and Chomping (What it could mean)
Anal Gland Impaction
Dogs have two small anal glands near their rectum. These glands occasionally become blocked or infected, leading to discomfort during defecation.
Straining, licking the rear end, scooting, and constipation are common symptoms. The discomfort can make a dog feel unwell, leading to nausea-induced drooling.
Infection or abscess of the anal glands can quickly escalate into pain, fever, and difficulty passing stool if not treated.
Spinal or Neurological Conditions
Herniated discs, spinal injuries, or certain neurological diseases can affect the nerves responsible for bowel movement.
Dogs with back pain or nerve dysfunction may not posture properly for defecation or may lose control of their bowel function altogether. The resulting constipation can cause gastrointestinal upset and drooling.
You might notice limping, reluctance to jump, trembling, or sudden yelping. These signs should not be ignored.
Gastrointestinal Illness or Inflammation
Inflammatory bowel disease (IBD), colitis, or other forms of intestinal inflammation can slow the movement of stool and irritate the stomach.
This can result in both constipation and excessive salivation. The dog may appear uncomfortable, refuse food, or have a bloated belly.
Gastrointestinal problems may require dietary changes, medications, and ongoing management to relieve symptoms and prevent complications.
Medication Side Effects
Some medications, particularly pain relievers (like opioids), antihistamines, or certain anti-nausea drugs, can cause constipation.
Additionally, medications can trigger nausea or excessive drooling as a side effect. If your dog recently started a new drug and is showing these signs, it could be the culprit.
Always consult your vet before stopping or switching medications, as improper discontinuation can cause harm.
Toxin Exposure
Dogs who ingest toxic substances—such as pesticides, certain plants, or cleaning agents—may develop nausea, drooling, and abdominal discomfort.
Some toxins can also affect bowel motility, resulting in constipation. You might see other symptoms like tremors, vomiting, diarrhea, or weakness.
Poisoning should be treated as an emergency, especially if multiple systems are affected.
What to Do If Your Dog Is Drooling and Constipated
Make sure your dog has constant access to clean, fresh water to reduce dehydration and ease stool passage. Hydration helps soften stool and supports normal digestive function.
Check your dog’s recent diet. Has there been a sudden change? Revert to a bland, easily digestible diet like boiled chicken and rice to see if symptoms improve. Avoid giving bones, rawhides, or high-fat treats during this time.
Encourage gentle movement. Short walks can stimulate intestinal activity and help relieve mild constipation.
Gently inspect the anal area for signs of swelling, redness, or discomfort. If you suspect an anal gland issue, avoid expressing them yourself unless trained. Seek veterinary help instead.
If your dog recently started a new medication, call your vet to ask if it could be causing these symptoms. They may recommend a dosage adjustment or an alternative drug.
When to Call or Visit Your Vet
Contact your vet immediately if your dog:
Has not had a bowel movement in more than 48 hours
Is drooling excessively with signs of nausea (lip licking, gulping, restlessness)
Shows signs of pain such as whining, hunched back, or trembling
Tries to vomit but can’t bring anything up
Has a hard, bloated abdomen
Refuses to eat or drink
Has a fever, bloody stool, or visible anal gland swelling
These may indicate a blockage, serious infection, toxin exposure, or another medical emergency that cannot be managed at home.
Read more: Dog Drooling and Confused (Could it be neurological?)
Key Takeaway
Drooling and constipation are both concerning symptoms in dogs—and when they happen together, they often point to discomfort, pain, or something more serious.
Stay calm, ensure your dog is hydrated, and monitor closely for changes. If symptoms persist or worsen, don’t wait—your vet can determine the cause and help your dog feel better quickly.
Early action not only helps relieve your dog’s discomfort but also prevents minor issues from becoming major health problems.