If you need to have a bowel movement and nothing’s happening, there are several things you can do right now to get things moving, plus longer-term habits that keep you regular. Some methods work within minutes, others take hours or days, so matching the right approach to your timeline matters.
What Works Right Now
The fastest natural option is a warm drink, especially coffee. Coffee stimulates gut motility through multiple pathways at once: caffeine speeds up muscle contractions in the colon, compounds in coffee trigger the release of a hormone called gastrin that further activates your digestive tract, and the warmth itself relaxes the smooth muscles in your intestines, reducing resistance so stool moves more easily. This effect is strongest in the morning, when your body’s gastrocolic reflex (the natural urge to go after eating or drinking) is at its peak. A cup of warm coffee on an empty stomach is one of the most reliable ways to trigger a bowel movement within 20 to 30 minutes.
Physical movement also helps. A brisk walk, light jog, or even a few minutes of deep squatting compresses your abdominal organs and stimulates your intestines mechanically. Pair it with that warm drink and you’re stacking the odds.
Your position on the toilet matters too. Sitting with your knees raised above your hips, using a small stool or stack of books under your feet, straightens the angle of your rectum and makes it significantly easier to pass stool. Lean slightly forward, relax your abdomen, and avoid straining. Trying to force it by bearing down hard can actually tighten the muscles you need to relax.
Over-the-Counter Laxatives by Speed
If natural methods aren’t cutting it, laxatives are widely available and fall into three main categories, each with a different timeline.
- Saline osmotic laxatives are the fastest option you can buy without a prescription. Products like magnesium hydroxide (Milk of Magnesia) pull water into your colon to soften stool and trigger contractions. These can work in as little as 30 minutes to six hours.
- Stimulant laxatives activate the nerves controlling your colon muscles, essentially forcing your colon into motion. Bisacodyl (Dulcolax) and senna typically work within 6 to 12 hours, so taking one before bed often produces a morning result.
- Bulk-forming laxatives like psyllium (Metamucil) add soluble fiber to your stool, drawing in water to make it larger and softer. The increased size triggers your colon to contract and push things along. These take 12 hours to three days, so they’re better for ongoing regularity than immediate relief.
Glycerin suppositories are another option when you need fast, localized relief. They work directly in the rectum by drawing water into the stool and lubricating the passage, often producing a result within 15 to 60 minutes.
Magnesium Citrate for Stubborn Cases
Magnesium citrate, sold as a liquid in most pharmacies, is a stronger osmotic laxative that both pulls water into the colon and increases the wavelike contractions that push stool through. It’s effective for more stubborn constipation and typically works within a few hours. Drink it with a full glass of water, since it works by drawing fluid into your intestines and you need to stay hydrated for it to be effective and safe. It’s not meant for daily use.
Fiber: The Long-Term Fix
If you’re regularly struggling to go, your fiber intake is the first thing to look at. Most adults fall well short of what their body needs. Women 50 and younger need at least 25 grams of fiber per day, while men in the same age range need 38 grams. After 50, the targets drop slightly to 21 grams for women and 30 grams for men. For reference, a typical slice of white bread has less than 1 gram. A cup of cooked lentils has about 15.
Not all fiber helps equally, though. Coarse wheat bran and psyllium increase the water content and bulk of your stool, which is what you want. Finely ground wheat bran and certain processed fiber supplements can actually worsen constipation. Fermentable fibers (found in beans, onions, and some supplements) tend to produce gas without much improvement in stool movement. Focus on whole fruits with skin, vegetables, legumes, oats, and psyllium husk if you’re supplementing.
Increase your intake gradually over one to two weeks. Jumping from 10 grams to 35 grams overnight will likely cause bloating and cramping before your gut adjusts.
Water and Timing Habits
Fiber only works if there’s enough water in your system to absorb. Dehydration makes stool hard and difficult to pass regardless of how much fiber you eat. There’s no magic number of glasses per day that applies to everyone, but if your urine is dark yellow, you’re not drinking enough for your bowels to function well.
Your body also responds to routine. Eating at consistent times trains your gastrocolic reflex to fire predictably. Many people find that sitting on the toilet 15 to 30 minutes after breakfast, even without an urge, helps establish a reliable pattern over time. Don’t rush it or scroll your phone for 20 minutes. Give yourself a few relaxed minutes, and if nothing happens, get up and try again later.
When Constipation Signals Something Serious
Occasional constipation is common and almost always manageable at home. But certain symptoms alongside constipation need prompt medical attention: severe abdominal pain with major bloating, vomiting, blood in your stool, or unexplained weight loss. If you haven’t had a bowel movement for an extended period and develop severe pain or bloating, that combination can indicate a bowel obstruction, which is a medical emergency.