Gas and constipation often show up together, and fixing one usually helps the other. Constipation slows the movement of waste through your digestive tract, giving gut bacteria more time to ferment food and produce gas. The result is that uncomfortable combination of bloating, pressure, and difficulty having a bowel movement. The good news: a few targeted changes to diet, hydration, and daily habits can break the cycle relatively quickly.
Why Gas and Constipation Feed Each Other
When stool sits in your colon longer than it should, bacteria continue breaking down the material and releasing gas that has nowhere to go. This creates bloating and cramping on top of the constipation itself. Anything that speeds up transit time through the gut tends to reduce gas as a side effect, which is why the most effective strategies target motility (how quickly things move through your system) rather than treating gas and constipation as separate problems.
Start With the Right Type of Fiber
Fiber is the single most important dietary change for constipation, but the wrong kind can make gas worse. There are two main types. Soluble fiber dissolves in water and forms a gel-like material that softens stool. You’ll find it in oats, apples, bananas, avocados, citrus fruits, carrots, barley, and psyllium. Insoluble fiber doesn’t dissolve in water. It adds bulk to stool and helps push material through the digestive system. Wheat bran, vegetables, and whole grains are common sources.
For constipation with gas, psyllium (the active ingredient in products like Metamucil) is a strong starting point because it draws water into stool without fermenting as aggressively as some other fibers. Increase your intake gradually over a week or two. Jumping from 10 grams of fiber a day to 30 grams overnight is a reliable way to make gas dramatically worse before it gets better.
The current dietary guidelines recommend 14 grams of fiber per 1,000 calories you eat, which works out to roughly 25 grams for most women and 38 grams for most men. Most people fall well short of that. Be cautious with processed foods that list added fiber ingredients like chicory root, cellulose, or pectin on the label. These added fibers are a common source of excess gas.
Drink More Water Than You Think You Need
Fiber without adequate water can actually make constipation worse by creating dry, bulky stool that’s harder to pass. The general recommendation is 1.5 to 2 liters per day (roughly six to eight glasses). One study of people with functional constipation who were already eating enough fiber found that drinking about 2 liters of fluid daily increased bowel movement frequency and reduced the need for laxatives, compared to a group drinking only about 1 liter. Water alone won’t fix constipation, but it makes every other intervention work better.
Use a Footstool on the Toilet
Your body position during a bowel movement matters more than most people realize. A standard toilet seat puts your body at a 90-degree angle, which partially kinks the pathway stool needs to travel. Placing your feet on a small stool (about 6 to 8 inches high) raises your knees above your hips and mimics a squat position. This straightens the path and lets the pelvic floor muscles relax, making evacuation easier without straining.
The technique from pelvic health specialists: place your feet hip-width apart on the stool, lean forward slightly, and rest your elbows on your knees. The gentle pressure of your thighs against your lower belly also helps. Keep your heels flat on the stool rather than lifting them, since raised heels cause the pelvic floor muscles to tighten and work against you.
Try Abdominal Self-Massage
A simple daily massage can stimulate the muscles that move waste through your colon. The technique follows the path of the large intestine, always moving from right to left. It’s easiest to do in the shower with soap or lying down with lotion on your fingertips.
- The “I” stroke: Using moderate pressure, stroke from your left ribcage straight down to your left hipbone. Repeat 10 times.
- The “L” stroke: Start at your right ribcage, stroke across to the left under your ribs, then down to your left hipbone. Repeat 10 times.
- The “U” stroke: Start at your right hipbone, stroke up to your right ribcage, across to the left ribcage, and down to the left hipbone. Repeat 10 times.
Finish with one to two minutes of clockwise circular massage around your belly button to stimulate the small intestine. Once a day is enough. Many people notice results within a few days.
Over-the-Counter Options That Work
If dietary changes aren’t enough, an osmotic laxative containing polyethylene glycol (sold as MiraLAX and generic versions) is a well-supported next step. It works by drawing water into the intestine, softening stool, and increasing bowel movements. It’s generally well tolerated, though it can temporarily cause some bloating and gas of its own as your system adjusts.
For gas specifically, products containing simethicone (Gas-X, Phazyme) break up gas bubbles in the gut and can provide quick relief from bloating and pressure. Simethicone doesn’t fix constipation, but it addresses the gas discomfort while you work on the underlying slow transit.
Stool softeners are the mildest option and work well for people whose constipation is relatively mild or situational. If a stool softener alone isn’t cutting it, stepping up to an osmotic laxative is the standard progression, according to Harvard Health.
Peppermint and Ginger for Gas Relief
Two herbal remedies have decent evidence behind them. Peppermint oil relaxes the smooth muscles of the digestive tract, which can ease cramping, bloating, and trapped gas. The active compounds, menthol and a related monoterpene, calm gut muscles and may reduce digestive tract sensitivity. If you have heartburn or reflux, look for enteric-coated peppermint capsules, which dissolve in the intestine rather than the stomach and are less likely to aggravate acid issues.
Ginger works differently. The gingerols in ginger root help prevent and relieve gas and bloating in the upper digestive system by easing pressure in the digestive tract. Fresh ginger in tea, grated into food, or taken as a supplement (500 to 1,000 mg daily is the range used in studies) can noticeably reduce bloating. Ginger is better for gas and nausea than for constipation itself, so think of it as a complement to fiber and hydration rather than a standalone fix.
Probiotics and Gut Bacteria Balance
The bacteria in your gut play a direct role in both gas production and transit time. Certain probiotic strains can shift that balance in a helpful direction. A large systematic review published in The Lancet’s eClinicalMedicine identified several specific strains effective for digestive symptoms, including Lactobacillus plantarum 299v, Saccharomyces boulardii, and multi-strain combinations containing Bifidobacterium lactis Bb12.
Probiotics aren’t a quick fix. Most trials show benefits after two to four weeks of consistent daily use. Look for products that list specific strain names and numbers on the label rather than just genus and species, since effectiveness varies dramatically between strains. Yogurt and fermented foods like kimchi and kefir provide some probiotic exposure, but typically at lower concentrations than supplements.
Movement and Timing Habits
Physical activity stimulates the muscles of the colon. Even a 20- to 30-minute walk after a meal can noticeably speed transit time. You don’t need intense exercise; moderate, consistent movement is more effective than occasional vigorous workouts.
Timing matters too. Your colon is most active in the morning and after meals, thanks to a reflex triggered by eating. Taking advantage of this by sitting on the toilet (with your footstool) about 15 to 30 minutes after breakfast gives your body its best natural window. Don’t strain or rush. If nothing happens after five minutes, get up and try again later. Straining worsens hemorrhoids and pelvic floor dysfunction, both of which can make constipation harder to treat over time.
When Gas and Constipation Signal Something Else
Occasional constipation and gas are extremely common and usually respond to the strategies above within a week or two. But certain symptoms alongside constipation warrant a closer look: blood in your stool (especially with fever), unexplained weight loss, constipation that starts suddenly after age 50 with no clear cause, persistent narrowing of stool, or significant worsening despite consistent dietary and lifestyle changes. These can point to conditions that need specific diagnosis and treatment beyond home management.