A dog that cries, whimpers, or yelps while pooping is in pain. The most common reasons are anal gland problems, constipation, or something irritating the rectum or colon, but several other conditions can make defecation painful. Some causes are minor and resolve quickly, while others need veterinary attention. Here’s how to figure out what’s going on.
Anal Gland Problems
This is one of the most frequent causes of painful pooping in dogs. Dogs have two small sacs on either side of the anus that normally release a small amount of fluid each time they defecate. When these sacs don’t empty properly, the contents thicken, the sac swells, and passing stool becomes uncomfortable or outright painful.
Impacted anal glands can progress to infection (called anal sacculitis) and even abscess formation, where the sac fills with pus and may rupture. You’ll often notice other signs alongside the crying: scooting their rear end along the floor, licking or biting at the anal area, holding the tail down, or a strong fishy smell. Some dogs leave traces of discharge on surfaces where they’ve been sitting. If you notice any of these signs combined with painful pooping, anal glands are the likely culprit. A vet or groomer can express the glands, and infections require antibiotics.
Constipation
When stool sits in the colon too long, the colon keeps absorbing water from it. The result is hard, dry stool that’s difficult and painful to pass. Dogs with constipation typically circle repeatedly, squat frequently without producing much, and in severe cases cry out during the attempt. Some dogs will have a tense, painful abdomen and react with a yelp or growl if you press on their stomach or lower back.
Constipation is usually temporary and can result from dehydration, lack of fiber, too little exercise, or swallowing something that’s hard to digest. A more severe form, called obstipation, involves a permanent or near-permanent blockage that the dog cannot resolve on its own. If your dog hasn’t had a bowel movement in more than two days or is straining repeatedly with no results, that warrants a vet visit.
Swallowed Objects
Dogs eat things they shouldn’t. Toys, socks, rocks, corn cobs, and bones are among the most common foreign objects that cause problems. Some of these can create partial blockages that make passing stool extremely painful. Sharp fragments, like bone shards, can scratch or tear the rectal lining on the way out.
String, ribbon, or thread is especially dangerous. Linear foreign bodies can saw through the intestinal wall as the gut tries to move them along, creating holes or perforations. If you know or suspect your dog swallowed string or anything with string attached, treat it as an emergency.
Intestinal Parasites
Several types of worms and single-celled parasites cause inflammation in the gut that makes pooping painful. Hookworms bite into the intestinal lining and feed on blood. Whipworms thread themselves into the intestinal wall and consume blood and tissue. Coccidia, a microscopic parasite, damages the intestinal lining and can cause abdominal pain, bloody diarrhea, and dehydration.
Parasite infections are especially common in puppies but can affect dogs of any age. Along with crying during defecation, you might notice diarrhea, bloody or mucus-covered stool, weight loss, a dull coat, or scooting. Your vet can diagnose most parasites with a simple stool sample and treat them with deworming medication.
Perianal Fistulas and Rectal Injuries
A perianal fistula is an open, draining wound near the anus. Dogs with fistulas often strain during defecation, lose their appetite, become lethargic, and obsessively lick or bite at their rear end. German Shepherds are particularly prone to this condition. The pain can be severe enough to cause noticeable personality changes.
Rectal tears, which can happen from passing sharp objects, straining too hard, or trauma, cause similar signs: straining, bleeding, reluctance to defecate, and obvious pain. If your dog seems afraid to poop or avoids it entirely, something in the rectal area may be injured.
Enlarged Prostate in Male Dogs
If your male dog is intact (not neutered), an enlarged prostate could be the issue. In dogs, the prostate grows outward away from the urethra, which means it presses against the rectum and colon rather than the urinary tract. This makes defecation difficult and painful, even though urination may seem normal. Neutering typically resolves the problem over time, as the prostate shrinks without testosterone stimulation.
Hip, Back, or Joint Pain
This one is easy to overlook. Pooping requires a dog to hold a squatting position, which puts significant strain on the hips, lower back, and hind legs. Dogs with hip dysplasia, arthritis, or spinal problems may cry during defecation not because of a digestive issue, but because the posture itself hurts.
Dogs with hip dysplasia show joint looseness that stretches the surrounding ligaments, joint capsule, and muscles, leading to instability and pain. Common signs include hind limb lameness, reluctance to rise or jump, a bunny-hopping gait when running, and muscle wasting in the back legs. If your dog also struggles with stairs, getting up from rest, or jumping into the car, the crying during pooping may be orthopedic rather than gastrointestinal.
Growths in the Rectum or Colon
Rectal polyps and tumors can partially obstruct the passage of stool or cause irritation every time stool moves past them. Signs include straining, painful defecation, blood in the stool, and intermittent diarrhea. In some cases, a polyp can prolapse (protrude from the anus). These growths are more common in older dogs. A vet can often detect them with a rectal exam or imaging.
Signs That Need Urgent Vet Care
Some situations call for a same-day or emergency vet visit rather than a wait-and-see approach. Get your dog seen right away if you notice blood in the stool or black, tarry stool, which indicates bleeding higher in the digestive tract. Multiple episodes of diarrhea, especially combined with vomiting, lethargy, or fever, also warrant immediate attention. Sudden onset of vomiting and bloody diarrhea in a dog that was previously healthy can signal a condition called acute hemorrhagic diarrhea syndrome, which can be fatal without treatment.
If your dog has been straining without producing stool for more than 24 hours, or if you suspect they swallowed a foreign object, don’t wait. A complete blockage is a surgical emergency. And if you see visible swelling, an open wound, or pus near the anus, infection is likely and needs prompt treatment before it worsens.
What to Watch For at Home
Before your vet appointment, pay attention to the details. Note whether the crying happens before, during, or after the stool comes out. Look at the stool itself: is it hard and dry, loose, bloody, or coated in mucus? Watch for scooting, licking at the rear, changes in appetite, or any shift in your dog’s energy level. Check whether they seem stiff or sore getting up from lying down, which could point to joint pain rather than a digestive problem. All of this information helps your vet narrow down the cause quickly, often with just a physical exam and a stool sample.