Relaxing your anus to poop comes down to three things: body position, breathing, and not fighting your body’s natural reflexes. Your anal canal has two ring-shaped muscles (sphincters) that control when stool passes through. One relaxes automatically when your rectum fills with stool. The other is under your voluntary control, and it’s the one that tends to tighten up when you strain, rush, or feel tense.
Why Your Anus Tightens in the First Place
Your anal canal is controlled by two separate sphincters that work as a team. The internal sphincter is a smooth muscle that stays contracted all day to keep things closed. When stool fills the rectum and stretches the rectal wall, a reflex called the rectoanal inhibitory reflex automatically relaxes this inner sphincter. You don’t control this one consciously; it happens on its own when your body senses it’s time to go.
The external sphincter is the one you can squeeze and release at will. It’s controlled by the same type of nerves that move your arms and legs. Normally, it relaxes during a bowel movement to let stool pass. But if you’re anxious, rushing, or straining too hard, this muscle can clamp down instead of opening up. Some people develop a pattern where the external sphincter paradoxically contracts every time they try to push, essentially working against the effort. This is a recognized condition called dyssynergic defecation, and it affects a significant portion of people with chronic constipation.
Fix Your Position First
The angle between your rectum and anal canal changes dramatically depending on how you sit. On a standard toilet, this angle sits around 80 to 90 degrees, which creates a kink that partially blocks the passage. In a squatting position, the angle opens to about 100 to 110 degrees, straightening the rectum and giving stool a clearer path out.
You don’t need to squat on the floor. A small footstool (about 6 to 8 inches high) placed in front of the toilet lets you raise your knees above your hips, mimicking a squat. Lean slightly forward with your elbows on your knees. This position relaxes a key muscle called the puborectalis, which wraps around the rectum like a sling. When you sit upright, this muscle stays tight and maintains that kink. When you lean forward with elevated knees, it loosens and the rectum straightens.
Breathe Instead of Strain
Bearing down hard is the most common mistake. When you hold your breath and push forcefully, your pelvic floor muscles (including the external sphincter) tend to tighten rather than release. This creates the frustrating sensation of pushing against a closed door.
Instead, try diaphragmatic breathing. Inhale slowly through your nose, letting your belly expand. Then exhale slowly through your mouth, and as you exhale, gently allow your abdomen to press downward. Think of it as a slow, controlled “bulge” rather than a forceful push. Some people find it helpful to make a soft “sss” or “ooo” sound while exhaling, which naturally prevents breath-holding and keeps the pelvic floor relaxed.
Between efforts, sit quietly and breathe normally for 10 to 15 seconds. Repeated forceful straining only makes the sphincter grip harder. Gentle, rhythmic pressure works far better than one sustained push.
Perineal Pressure Can Help
Applying gentle pressure to your perineum (the area of skin between your genitals and anus) before and during a bowel movement can make a real difference. Research has shown that perineal pressure increases rectal tone by roughly 52% and may help relax the anal sphincters and the puborectalis muscle. It can also help break up hard stool that’s sitting in the lower rectum.
The technique is simple. Using two or three fingertips, press firmly but gently on the perineum in a rhythmic, repeated motion. You can do this while sitting on the toilet, reaching behind or underneath. Apply pressure toward the back of the body, in the direction of the tailbone. This stimulates the parasympathetic nerves in the sacral area that promote relaxation and bowel movement. It takes only a minute or two and can be done just before or during your attempt.
Timing and Routine Matter
Your colon is most active after meals, especially breakfast. This is called the gastrocolic reflex: eating triggers a wave of movement through the large intestine. Sitting on the toilet 15 to 30 minutes after a meal takes advantage of this natural momentum. If you try to go at random times when your colon is quiet, you’re more likely to strain and tense up.
Warm beverages amplify this reflex. A cup of coffee or warm water with breakfast is a well-known trigger for many people. The combination of food in the stomach and warm liquid can produce a reliable urge within 20 to 30 minutes.
Set a time limit. If nothing happens within 5 to 10 minutes, get up and try again later. Sitting on the toilet for extended periods trains your body to associate the position with straining rather than relaxation, and it puts unnecessary pressure on the pelvic floor.
When Relaxation Doesn’t Come Naturally
If you consistently feel like your anus tightens or closes when you try to push, you may have dyssynergic defecation. This affects people who have developed a pattern where the muscles that should relax during a bowel movement instead contract. The hallmark is a paradoxical increase in anal sphincter pressure during attempted defecation, or less than 20% relaxation of the resting pressure. It often accompanies chronic constipation or constipation-predominant IBS.
Dyssynergic defecation is diagnosed through specialized testing, typically anorectal manometry, which measures the pressures in your anal canal while you attempt to simulate a bowel movement. The condition is treatable. Biofeedback therapy, where sensors give you visual or audio feedback about your muscle activity so you can learn to coordinate them correctly, is the primary treatment. A typical course runs about 6 sessions over several weeks. Among patients who achieve meaningful improvement, nearly 90% maintain that improvement for at least a year. The results vary, but for people whose core problem is muscle coordination rather than slow motility, biofeedback retrains the pattern effectively.
Quick Checklist for Your Next Attempt
- Elevate your feet on a stool so your knees are above your hips
- Lean forward with elbows resting on your thighs
- Breathe out slowly while gently expanding your abdomen downward
- Never hold your breath while pushing
- Apply perineal pressure with your fingertips if stool feels stuck
- Limit your time to 5 to 10 minutes per attempt
- Try after meals when your colon is naturally more active
Stool consistency also plays a major role. If your stool is hard and dry, no amount of relaxation technique will make it pass easily. Adequate water intake (at least 6 to 8 glasses daily) and fiber from fruits, vegetables, and whole grains keep stool soft enough that your sphincters don’t need to open as wide or work as hard. Soluble fiber from sources like oats, flaxseed, and psyllium husk is particularly effective at creating a soft, formed stool that moves through with minimal effort.