Why Does My Stomach Hurt When I Push to Poop?

Straining during a bowel movement sharply raises the pressure inside your abdomen, and that pressure spike is the most common reason your stomach hurts when you push. Measurements show that intra-abdominal pressure during normal defecation averages around 97 mm Hg, but in people who are constipated the average more than doubles to around 209 mm Hg. That force presses on your intestines, stomach, and surrounding muscles all at once. But the pressure itself is only part of the story, because a range of conditions can make the pain worse, more persistent, or a sign that something specific needs attention.

What Happens Inside Your Abdomen When You Bear Down

The act of pushing to poop is essentially a controlled version of what doctors call the Valsalva maneuver: you close your throat, tighten your abdominal wall muscles, and bear down against a closed system. This creates a wave of pressure that pushes stool toward the exit, but it also compresses everything else in the abdominal cavity. Your stomach, small intestine, and colon all get squeezed. That compression alone can produce an aching, cramping sensation, especially if you are pushing hard or for a long time.

The Valsalva maneuver also affects the vagus nerve, triggering changes in your autonomic nervous system that can cause lightheadedness, nausea, or a drop in heart rate on top of the abdominal discomfort.¹ So the pain and the queasy, unpleasant feeling many people describe are two sides of the same coin: the body generating enormous internal force to move stool, and the organs caught in the crossfire of that force.

Constipation makes the math worse. When stool is hard or the rectum is not cooperating, you push harder and longer. Research measuring pressures during defecation found that constipated patients generated roughly twice the intra-abdominal pressure of people with normal bowel function.² More pressure means more compression of your stomach and intestines, which means more pain.

When Your Pelvic Floor Works Against You

Sometimes the problem is not just how hard you push but the fact that pushing is not working the way it should. In a condition called dyssynergic defecation, the muscles of the pelvic floor and the abdominal muscles fail to coordinate properly. Instead of the pelvic floor relaxing to let stool pass while the abdomen contracts to push it out, the pelvic floor tightens at the wrong moment. The result is that you strain harder and harder against a door that will not open.

This is not rare. Dyssynergic defecation affects up to half of all patients with chronic constipation.³ Because the body is working against itself, the pressure buildup inside the abdomen becomes excessive and prolonged, and the resulting stomach pain can feel deep and diffuse. People with this problem often describe a sensation of blockage, like the stool is right there but will not come out no matter how much effort they apply. The extra straining puts stress on the abdominal wall, can cause cramping in the upper and lower belly, and sometimes radiates into the lower back.

The good news is that dyssynergic defecation is considered a learned, behavioral problem rather than a structural one, which means it responds well to biofeedback therapy, where a specialist retrains the coordination between your pushing muscles and your pelvic floor.

Anal Fissures and the Pain-Spasm Cycle

If the pain is sharp, burning, and concentrated around your anus rather than deep in your belly, an anal fissure is a likely culprit. A fissure is a small tear in the lining of the anal canal, and it triggers a vicious cycle: the tear causes intense pain during and after a bowel movement, which makes you dread going, which leads to holding stool longer, which makes the stool harder, which tears the lining again on the next attempt.

The pain from a fissure is driven by two things: the mechanical splitting of sensitive tissue, and a reflexive spasm of the internal anal sphincter that raises the resting pressure in the canal and reduces blood flow to the area. That reduced blood flow impairs healing, which is why fissures can become chronic.⁴ Although the sharpest pain is felt at the anus, many people also report aching or cramping in the lower abdomen during straining, because the sphincter spasm radiates tension into the surrounding muscles and the act of pushing against that spasm forces the abdomen to generate even higher pressures.

A Gut That Feels Too Much

Some people experience stomach pain with straining not because the pressure is unusually high but because their gut is unusually sensitive to normal pressure. This is called visceral hypersensitivity, and it is a hallmark of irritable bowel syndrome and other functional gut disorders. In a hypersensitive gut, the ordinary stretch and movement that comes with pushing to poop gets amplified into a pain signal that the brain interprets as something far more intense than it should be.⁵

What this means in practical terms is that you can have completely normal stool, normal anatomy, and normal transit time and still have significant pain when you bear down. The wiring is the issue, not the plumbing. People with visceral hypersensitivity often notice that stress, poor sleep, or certain foods make the pain worse, because those factors lower the threshold at which the gut starts sending alarm signals. If your doctor has told you everything looks structurally normal but you still hurt every time you push, hypersensitivity is worth discussing.

Inflammatory Bowel Disease and Rectal Inflammation

When the lining of the rectum is inflamed, straining becomes painful in a different way. In ulcerative colitis, for example, inflammation in the rectum makes the rectal wall stiffer and more sensitive, reducing its ability to stretch and accommodate stool. The mechanism involves both the physical damage to the tissue and a secondary hypersensitivity that develops in chronically inflamed areas.⁶ The result is that even a small amount of stool in the rectum can trigger urgent, painful cramping, and pushing to evacuate compounds that pain because it compresses already-damaged tissue.

Crohn’s disease, radiation proctitis, and infections can produce similar rectal inflammation with similar pain-on-straining patterns. The key distinguishing feature is that the pain usually comes with other symptoms: blood in the stool, mucus, urgency, diarrhea, or a persistent feeling that you have not fully emptied. If straining pain appeared alongside any of these, that is a strong signal to see a gastroenterologist rather than assuming you are just constipated.

Endometriosis and Pain With Bowel Movements

For women, one frequently overlooked cause of painful straining is endometriosis involving the area behind the uterus. When endometrial-like tissue grows on or near the rectum, the rectovaginal septum, or the posterior vaginal wall, it can cause a specific symptom called dyschezia: pain with defecation. In a study of 360 women with deep infiltrating endometriosis, rectovaginal involvement was found in two-thirds of them, and those women reported significantly higher pain scores during bowel movements than women whose endometriosis was located elsewhere.⁷

The pain tends to worsen around menstruation because the misplaced tissue responds to hormonal cycles, swelling and becoming more inflamed at the same time the uterus is shedding its lining. Women who notice that pushing to poop is far more painful during their period, especially if they also have painful sex or chronic pelvic pain, should raise endometriosis as a possibility with their doctor. It is routinely missed because bowel symptoms are not the first thing most clinicians associate with the condition.

Rectocele and the Feeling of Incomplete Emptying

A rectocele is a bulge of the front wall of the rectum into the back wall of the vagina. It is extremely common, especially in women who have had vaginal deliveries, and it can make defecation difficult enough that significant pushing is required. Symptoms often include pelvic pressure, a sense that stool is stuck, and pain during straining.⁸ Some women find they can only complete a bowel movement by pressing on the vaginal wall to support the rectum from the outside, a maneuver called splinting.

Because a rectocele traps stool in its pouch, the person has to push harder and longer to evacuate, which drives up intra-abdominal pressure and creates the same deep abdominal aching described earlier. The condition is often found alongside pelvic floor dysfunction, and the two can reinforce each other: the rectocele makes complete emptying harder, which leads to more straining, which weakens the pelvic floor further.

Medications That Set the Stage for Painful Straining

If you recently started a new medication and noticed that bowel movements became harder and more painful, the drug itself may be the trigger. Opioid painkillers are the most well-known offenders. They slow down the propulsive movements of the intestines, increase muscle tone in the colon wall, and reduce water secretion into the gut. The result is stool that is drier, harder, and moves through the system more slowly, which means you have to push much harder to get it out.⁹

Opioids are not the only culprits. Calcium channel blockers, certain antidepressants, iron supplements, and anticholinergic drugs all slow gut transit or dry out stool in various ways. If you can trace the onset of painful straining to a medication change, talk to your prescriber. Adjusting the dose, switching drugs, or adding a stool softener can break the cycle before it becomes chronic.

What Chronic Straining Does Over Time

One reason to take painful straining seriously rather than just enduring it is that the act itself causes damage over time. Research on women with chronic constipation and perineal descent found that repeated straining injures the pudendal nerves, which control the muscles of the anal sphincter. The longer the history of straining, the more severe the nerve damage, eventually leading to weakness in the sphincter itself.¹⁰ That weakness can in turn cause fecal incontinence, creating a new set of problems that are harder to treat than the original constipation.

Chronic straining also raises the risk of hemorrhoids, rectal prolapse, and hernias in the abdominal wall or groin. The sustained high pressures that cause your stomach to hurt are the same pressures that push tissue out of its normal position. Treating the underlying constipation or coordination problem is not just about comfort; it protects you from structural damage that accumulates over years.

How Posture Changes the Equation

The angle between your rectum and your anal canal matters more than most people realize. When you sit on a standard toilet, your hips are at roughly a 90-degree angle, and the puborectalis muscle maintains a kink in the rectum that partially obstructs the exit path. To push stool past that kink, you need more force, which means more abdominal pressure and more pain.

Squatting opens that angle to about 100 to 110 degrees, straightening the rectum and making evacuation easier with less force.¹¹ Studies on devices that emulate squatting posture by elevating the feet during sitting found that users strained less, felt more complete emptying, and spent less time on the toilet.¹² If your stomach hurts every time you push and your stool is not particularly hard, simply putting a small stool or step under your feet may reduce the force you need and cut the pain substantially. It is one of the easiest interventions available and costs almost nothing.

How Doctors Figure Out the Cause

If painful straining is persistent, your doctor has a few ways to narrow down the cause. A digital rectal exam is the starting point: it can reveal fissures, hemorrhoids, rectoceles, and abnormal muscle tone. For more detailed assessment, anorectal manometry places pressure-sensing catheters in the rectum to measure sphincter tone, rectal sensitivity, and the coordination between your pushing effort and your pelvic floor relaxation during a simulated evacuation.¹³ This test is particularly useful for identifying dyssynergic defecation, because it can show the exact moment when the pelvic floor contracts instead of relaxing.

Depending on the suspected cause, other tests might include a colonoscopy to rule out inflammatory disease or structural problems, imaging to look for endometriosis, or transit studies that track how quickly material moves through the colon. The point of these tests is not to investigate every possibility at once but to match the investigation to the pattern of symptoms. Sharp pain at the anus with visible blood points toward a fissure. Deep aching with a sense of blockage points toward dyssynergy or a rectocele. Cyclical pain tied to menstruation points toward endometriosis.

Simple Measures That Reduce the Need to Push

Most stomach pain during bowel movements comes from excessive force, so anything that softens stool or improves coordination reduces the pain. Adequate fiber intake and hydration are the foundation: they increase stool bulk and water content, making it easier to pass without heavy straining. Fiber works best when introduced gradually, because a sudden increase can cause bloating and gas that temporarily make things worse.

Osmotic laxatives like polyethylene glycol draw water into the stool and are safe for regular use when lifestyle changes are not enough. They reduce the need for straining without stimulating the gut in ways that cause cramping. Stool softeners work differently, lowering surface tension so water penetrates the stool more easily. For people whose pain is driven by dyssynergy rather than hard stool, biofeedback therapy retrains the muscles and has strong evidence behind it. And for everyone, the postural adjustment described earlier, leaning forward and elevating the feet, reduces the mechanical resistance that makes pushing necessary in the first place.

One common mistake is relying on stimulant laxatives like senna or bisacodyl as a daily solution. These work by triggering contractions in the colon, which can cause their own cramping pain and, over time, may make the colon less responsive. They are fine for occasional use but should not be the long-term answer to a chronic straining problem. If you find yourself reaching for stimulant laxatives more than once or twice a week, that is a signal to investigate what is causing the constipation rather than just overriding it.