Chronic constipation affects roughly one in five adults and is defined by more than just infrequent bowel movements. The standard diagnostic criteria require at least two of the following for three months or longer: straining during more than 25% of bowel movements, hard or lumpy stools more than 25% of the time, or a persistent feeling of incomplete evacuation. If that sounds familiar, there are concrete steps you can take, starting with diet and daily habits, before moving to laxatives or specialized therapy.
Increase Fiber Gradually
Fiber is the single most effective dietary change for chronic constipation, but the type matters. Insoluble fiber, found in whole wheat, vegetables, and nuts, passes through your digestive tract largely intact and speeds up transit time. Soluble fiber, found in oats, beans, and fruits, dissolves in water and forms a gel that softens stool. You need both, but if your constipation involves hard, dry stools, prioritizing soluble fiber sources can make a noticeable difference.
Current dietary guidelines recommend 14 grams of fiber for every 1,000 calories you eat. For most adults, that works out to somewhere between 25 and 35 grams a day. The key is adding fiber slowly, maybe 3 to 5 grams more per day each week, because jumping from a low-fiber diet to a high one too quickly causes bloating and gas that can make you want to quit entirely. Ground flaxseed, chia seeds, and psyllium husk are easy additions that pack a lot of fiber into a small serving.
Drink Enough Water to Make Fiber Work
Fiber without adequate fluid can actually worsen constipation. When fiber absorbs water in the colon and there isn’t enough to go around, stool becomes drier and harder to pass. A common target is 1.5 to 2 liters (roughly 6 to 8 glasses) per day. One study in people with functional constipation who were already eating 25 grams of fiber daily found that drinking about 2 liters of fluid per day increased bowel movement frequency and reduced laxative use compared to drinking about 1 liter. Plain water is fine. Coffee counts toward your total, though its mild laxative effect fades with habitual use.
Fix Your Position on the Toilet
The way you sit matters more than most people realize. A muscle called the puborectalis wraps around the rectum like a sling, pulling it forward to maintain continence. When you sit on a standard toilet, that muscle stays partially contracted, keeping a sharp bend in the rectum that you have to strain against. When you bring your knees above your hips, mimicking a squat, the muscle relaxes and the rectum straightens, letting gravity assist.
A small footstool (6 to 9 inches tall) placed in front of the toilet achieves this angle. Lean slightly forward, rest your forearms on your thighs, and let your belly relax outward rather than bearing down. This simple change can reduce straining significantly, especially if you tend to feel like stool is “stuck” near the exit.
Build Regular Habits
Your colon has a natural surge of activity after meals, particularly breakfast. Sitting on the toilet 15 to 20 minutes after eating, even if you don’t feel an urge, trains your body to expect a bowel movement at that time. Consistency matters more than duration. Five unhurried minutes is better than 20 minutes of scrolling and straining.
Physical activity also plays a real role. Movement stimulates the muscles that push food through your intestines. You don’t need intense exercise. A daily 20- to 30-minute walk is enough to measurably improve transit time, especially if your current lifestyle is mostly sedentary.
Check Your Medications
Many common medications slow the colon down. Opioid pain medicines are the most well-known culprits, but the list is longer than most people expect: antacids, antidepressants, certain blood pressure medications, antihistamines (often found in cold medicines), and calcium and iron supplements all contribute. If your constipation started or worsened around the time you began a new medication, that connection is worth raising with your prescriber. Sometimes switching to an alternative or adjusting the dose resolves the problem entirely.
Over-the-Counter Laxatives
When diet and habits aren’t enough, laxatives can help, but choosing the right type matters.
Osmotic laxatives pull water into the colon from surrounding tissue, softening stool so it’s easier to pass. Polyethylene glycol (sold as MiraLAX and generics) is the most commonly recommended option for chronic use because it’s gentle, predictable, and doesn’t cause dependence. Magnesium hydroxide (Milk of Magnesia) works the same way but can cause electrolyte shifts if used long term, so it’s better for occasional relief.
Stimulant laxatives work differently. They activate the nerves controlling the muscles in your colon, forcing it into motion. Bisacodyl and senna are the two main options. These are effective for occasional use but can cause cramping, and relying on them daily for weeks may reduce your colon’s natural motility over time. Think of stimulant laxatives as a rescue tool, not a daily strategy.
Fiber supplements like psyllium are technically a third category (bulk-forming laxatives) and are the safest option for long-term, daily use. They work the same way dietary fiber does, just in a more concentrated form.
When the Problem Is Muscle Coordination
Some people with chronic constipation eat plenty of fiber, drink enough water, and still can’t evacuate comfortably. In many of these cases, the issue is dyssynergic defecation: the pelvic floor muscles that should relax during a bowel movement instead tighten or fail to release. This creates a physical roadblock. You might feel like you need to go but nothing moves, or that you can never fully empty.
The primary treatment is biofeedback therapy, typically done with a specialized physical therapist or nurse. A small sensor placed in the anal canal monitors muscle tension and relaxation through electrical signals, displaying real-time feedback on a screen. You learn to identify what relaxation actually feels like in those muscles, isolate the pelvic floor from other muscle groups, and practice the correct pattern until it becomes automatic. The goal is to replace the maladaptive tightening pattern with new muscle memory through repetition. Programs can be intensive (several sessions over a few weeks) or spread over months, depending on the clinic. This therapy is effective for the majority of people with dyssynergia, and the results tend to last because you’re retraining a movement pattern rather than relying on medication.
Symptoms That Need Prompt Attention
Most chronic constipation is functional, meaning there’s no underlying structural disease. But certain symptoms alongside constipation are red flags that warrant evaluation rather than self-treatment. These include blood in your stool, unintended weight loss of 10 pounds or more, iron deficiency anemia, and constipation that starts suddenly in someone over 50 with no prior history. A family history of colon cancer also lowers the threshold for investigation. These signs don’t necessarily mean something serious is wrong, but they do mean imaging or a colonoscopy may be needed to rule out conditions like colon cancer, inflammatory bowel disease, or diverticulosis.