When you’re constipated and need to go now, the fastest relief comes from changing your body position, using specific physical techniques, and choosing the right over-the-counter product if needed. Some methods work in minutes, others within an hour. Here’s what actually works, ranked roughly by speed.
Change Your Sitting Position First
The single fastest thing you can do costs nothing and takes zero preparation: raise your knees above your hips while sitting on the toilet. A muscle called the puborectalis wraps around your rectum like a sling, pulling it forward and creating a kink that helps you stay continent throughout the day. When you sit on a standard toilet, that kink only partially straightens. Squatting widens the angle significantly, creating a straighter path for stool to pass through.
You don’t need to squat on the toilet rim. Place a footstool, a stack of books, or an overturned bin under your feet so your knees rise above hip level. Lean forward slightly with your elbows on your thighs. This mimics a squatting posture and relaxes the pelvic floor muscles that are otherwise clamping down on your rectum.
Use the Perineal Pressure Technique
This is one of the least-known methods, but it has solid clinical backing. In a randomized trial at UCLA, 72 percent of participants said that pressing on the perineum (the area of skin between the anus and genitals) helped them have a bowel movement. The technique breaks up hard stool, relaxes surrounding muscles, and stimulates the nerves responsible for triggering a bowel movement. Over half of participants also said it helped them avoid hemorrhoids or reduce existing ones.
To do it: when you feel pressure in your rectum but can’t pass the stool, use two or three fingers to apply firm, steady pressure to your perineum. Press rhythmically, holding for a few seconds and releasing. You can do this while sitting on the toilet in the elevated-knee position described above. Patients in the study needed only three to five minutes of initial instruction and then used the technique on their own, averaging three to four times per week. Eighty-two percent said they’d keep using it after the study ended.
Breathe With Your Belly, Not Your Chest
Your instinct when constipated is to bear down hard and hold your breath. This is the opposite of what helps. That straining motion, called a Valsalva maneuver, actually tightens the pelvic floor and narrows the passage stool needs to travel through. Repeated forceful straining also spikes blood pressure, contributes to hemorrhoids, and in people with heart conditions can cause fainting or worse.
Instead, use diaphragmatic breathing. Your diaphragm and pelvic floor move in sync: when the diaphragm contracts on an inhale, the pelvic floor naturally relaxes and drops. To use this on the toilet, place one hand on your belly. Inhale slowly through your nose for three to four seconds, letting your belly push outward against your hand. Your chest should stay relatively still. As your belly expands, your pelvic floor opens. Then exhale gently while allowing a mild, controlled push. This “breathe and bulge” approach creates downward pressure without clamping the exit shut.
Trigger Your Gastrocolic Reflex
Your digestive system has a built-in trigger: when your stomach stretches with food or liquid, it signals the colon to start moving. This is called the gastrocolic reflex, and it’s strongest in the morning after an overnight fast. You can feel colon movement begin within minutes of eating or drinking, though the urge to actually go can take anywhere from a few minutes to about an hour.
To use this strategically, drink a large glass of warm water or a cup of coffee first thing in the morning, then eat something. Coffee is particularly effective because caffeine independently stimulates colon contractions. Warm liquids seem to work faster than cold ones. After drinking, give yourself 15 to 30 minutes of unhurried time near a bathroom. Combine this with the squatting position and breathing technique above.
Fastest Over-the-Counter Options
If physical techniques aren’t enough, the speed of relief depends entirely on which product you choose. They are not all equal.
Glycerin suppositories are the fastest option you can buy without a prescription. You insert one rectally, and it typically produces a bowel movement within 15 minutes to one hour. Glycerin works by drawing water into the stool and lubricating the rectal lining, softening what’s already sitting in the lower bowel. This is the best choice when stool feels close but won’t come out.
Saline enemas (the squeeze-bottle type sold at most pharmacies) are the other fast-acting option. They pull water from the colon wall into the stool, making it softer and easier to pass. Sodium phosphate enemas are the fastest-acting type available. You’ll typically feel the urge within minutes. These are useful when a suppository isn’t enough or when you feel very full and blocked.
Magnesium hydroxide (Milk of Magnesia) is an oral option that works within 30 minutes to 6 hours. It draws water into the intestines osmotically, softening stool throughout the colon rather than just at the exit. Drink it with a full 8-ounce glass of water. The wide time range means it’s less predictable for “right now” relief, but it’s a reasonable choice if you’d rather take something by mouth and can wait a bit.
Oral stimulant laxatives and fiber supplements are not “instant” solutions. Fiber-based products can take one to three days to work, and stimulant tablets typically need 6 to 12 hours. They’re better for preventing your next episode than solving this one.
A Quick Routine to Try Right Now
Combine the fastest techniques into one sequence. Drink a large glass of warm water or hot coffee. While waiting for the gastrocolic reflex to kick in, do some gentle movement: walk around, twist your torso side to side, or massage your lower abdomen in clockwise circles (following the path of the colon). When you feel any hint of an urge, sit on the toilet with your feet elevated on a stool. Lean forward, breathe deeply into your belly, and apply gentle perineal pressure if the stool feels stuck. Give yourself at least 10 to 15 unhurried minutes. If nothing happens after 20 minutes, a glycerin suppository is your next step.
Preventing the Next Episode
The recommended fiber intake is 14 grams per 1,000 calories you eat, which works out to roughly 25 grams for most women and 30 to 35 grams for most men. Most Americans get about half that. Increasing fiber gradually (too fast causes gas and bloating), drinking enough water, and staying physically active are the three pillars that prevent constipation from recurring. Even moderate daily walking stimulates the colon.
Signs Something More Serious Is Happening
Occasional constipation is common and usually harmless. But certain patterns signal a possible fecal impaction, where a large mass of dry, hard stool gets stuck in the rectum and won’t pass with normal methods. The telltale sign is paradoxical diarrhea: sudden watery leakage in someone who’s been constipated for days. This happens because liquid stool seeps around the blockage. Other warning signs include rectal bleeding, very thin pencil-like stools, abdominal pain with an inability to pass gas, rapid heartbeat or lightheadedness from straining, and lower back pain. If you experience sudden constipation with cramping and can’t pass gas or stool at all, don’t take laxatives. That combination needs medical evaluation promptly.