Chronic constipation is treatable, and most people find relief through a combination of dietary changes, over-the-counter products, and habit adjustments before ever needing a prescription. The condition is clinically defined as having fewer than three spontaneous bowel movements per week, along with symptoms like straining, hard stools, or a feeling of incomplete evacuation lasting at least three months. What works depends on the underlying cause, so treatment often involves trying several strategies in a logical order.
Start With Fiber, but Choose the Right Kind
Fiber is the first-line treatment for a reason: it physically changes how stool moves through your colon. The general recommendation is about 14 grams of fiber for every 1,000 calories you eat, which works out to roughly 25 to 30 grams a day for most adults. The average American gets about half that.
Not all fiber works the same way. Insoluble fiber, found in wheat bran, vegetables, and whole grains, draws water into the stool and adds bulk. This is the type most directly linked to reducing constipation. Soluble fiber, found in oats, beans, and some fruits, dissolves into a gel and is better known for its effects on blood sugar and cholesterol. Both types matter for overall gut health, but if constipation is your main concern, prioritize insoluble fiber sources.
Increase your intake gradually over one to two weeks. Adding too much fiber too quickly causes bloating and gas, which leads many people to abandon it before seeing results. Pair the increase with extra water (more on that below).
Prunes, Kiwi, and Psyllium All Work
If you’d rather reach for a whole food than a supplement, prunes and green kiwifruit both have solid clinical support. A randomized trial published in The American Journal of Gastroenterology compared 100 grams of prunes per day (about 10 prunes), two green kiwifruits per day, and 12 grams of psyllium husk per day in people with chronic constipation. All three significantly increased weekly bowel movements and reduced straining.
Kiwi and prunes also improved stool consistency, making stools softer and easier to pass. Kiwi had the fewest side effects of the three, while psyllium had the most, primarily bloating. If you’ve been relying on psyllium and finding it uncomfortable, switching to prunes or kiwi is a reasonable move. Psyllium still works well for many people, especially when started at a low dose and increased slowly.
Water Matters More Than You Think
Drinking more water on its own may not fix constipation if you’re already well hydrated. But when combined with a high-fiber diet, the effect is meaningful. In one trial, people eating 25 grams of fiber daily who also drank 2 liters of water had significantly more bowel movements per week (4.2 versus 3.3) compared to those eating the same fiber without the extra fluid. Fiber needs water to do its job. Without enough liquid, added fiber can actually make things worse by creating drier, harder stool.
Mineral-rich water may offer an extra edge. A meta-analysis found that high-mineral water was about 47% more likely to produce a positive treatment response than low-mineral water, likely because of its magnesium content.
Over-the-Counter Laxatives
When diet alone isn’t enough, osmotic laxatives are the most commonly recommended next step. These work by pulling water into the intestines, softening stool and triggering movement.
Polyethylene glycol 3350 (sold as MiraLAX and generics) is the most widely studied option. It’s a tasteless powder you mix into any beverage, and it’s considered safe for daily use over weeks to months. In clinical studies, it significantly increases both stool frequency and softness. It doesn’t cause the cramping that stimulant laxatives often do.
Magnesium supplements work through a similar osmotic mechanism. Magnesium citrate and magnesium oxide both draw water into the bowel and relax intestinal muscles, which helps restore the natural wave-like contractions that push stool along. If you’re trying magnesium for the first time, start with a low dose and increase gradually. Too much too soon causes loose stools or diarrhea.
Stimulant laxatives (like bisacodyl or senna) are effective for short-term use but aren’t ideal as a daily long-term solution. They work by directly stimulating the nerves in your colon wall to contract. They’re useful for occasional breakthrough constipation when osmotic options aren’t providing enough relief on their own.
Change How You Sit on the Toilet
Your body position on the toilet affects how easily stool passes. When you sit on a standard toilet with your feet flat on the floor, a muscle called the puborectalis wraps around the rectum at an angle that partially kinks the passage. Elevating your feet on a footstool (like a Squatty Potty or a stack of books) opens this angle, allowing the muscle to relax and the rectum to straighten. Many people notice an immediate difference in how much straining is required. This is a free, zero-risk intervention worth trying before anything else.
Pelvic Floor Therapy for Stubborn Cases
Some people strain hard but can’t coordinate the muscles needed to actually push stool out. This is called dyssynergic defecation, a condition where the pelvic floor muscles tighten instead of relaxing during a bowel movement. It’s more common than most people realize, and no amount of fiber or laxatives will fully solve it because the problem is muscular, not dietary.
Biofeedback therapy is the primary treatment. A physical therapist uses sensors to show you, in real time, what your pelvic floor muscles are doing so you can retrain the coordination. In one study, over 91% of patients reported improvement after an average of six weekly sessions. Published success rates across multiple studies range from 18% to 100%, with the wide range reflecting differences in how strictly “success” is defined. For well-motivated patients with a confirmed pelvic floor problem, biofeedback is low-cost, has no side effects, and often works when everything else has failed.
Prescription Options
If you’ve worked through dietary changes, over-the-counter laxatives, and behavioral strategies without adequate relief, prescription medications are the next tier. According to a 2023 clinical guideline from the American Gastroenterological Association, prescriptions are typically reserved for people who haven’t improved after trying multiple over-the-counter approaches.
The two main categories are secretagogues, which cause the lining of your intestines to release more fluid into the bowel, and prokinetic agents, which speed up the movement of your colon. Both require a prescription and are taken daily. Your doctor will choose based on your symptom pattern, and most people notice improvement within the first one to two weeks.
Symptoms That Need Medical Attention
Most chronic constipation is functional, meaning there’s no dangerous underlying cause. But certain symptoms alongside constipation warrant prompt evaluation: blood in the stool or rectal bleeding, unexplained weight loss, persistent abdominal pain that doesn’t resolve with a bowel movement, and new-onset weakness or fatigue. These can overlap with signs of colorectal cancer or other serious conditions. If constipation starts suddenly after age 50, or if your pattern changes dramatically without an obvious explanation like a new medication or travel, that also justifies a conversation with your doctor sooner rather than later.