The foods most likely to aggravate hemorrhoids are those that cause constipation, dehydration, or both. Refined carbohydrates, red meat, alcohol, and low-fiber processed foods top the list because they lead to harder stools and more straining during bowel movements. That straining increases pressure in the abdomen, which pushes blood into the veins around the anus and rectum, making existing hemorrhoids swell and bleed.
Low-Fiber and Processed Foods
This is the single biggest dietary factor. Foods rich in refined carbohydrates, added sugar, and fat but low in fiber produce stools that are dry, compact, and hard to pass. White bread, pastries, chips, frozen meals, and fast food all fall into this category. The problem isn’t that these foods are directly irritating. It’s that they replace the fiber-rich foods your digestive system needs to move waste through efficiently.
Fiber pulls water into the colon, softening stool and reducing the time it spends in your intestines. Without enough of it, stool dries out as it moves through the large intestine, which absorbs water along the way. The drier and harder the stool, the more you strain to pass it, and that strain is what inflames hemorrhoidal tissue. Current dietary guidelines recommend 14 grams of fiber per 1,000 calories you eat, which works out to roughly 25 grams a day for most women and 34 grams for most men. Most Americans get about half that.
Red Meat and High-Protein, Low-Fiber Diets
Red meat is slow to digest and contains zero fiber. A steak or burger isn’t a problem on its own, but meals built around meat with few vegetables or whole grains leave your digestive system without the bulk it needs. This is why all-meat diets like the carnivore diet are strongly associated with constipation and hemorrhoid flare-ups. Fiber is responsible for bulking up stool, holding water in the digestive tract, and helping everything pass smoothly. Without it, stools become small, hard, and difficult to move.
If you eat red meat regularly, the fix isn’t necessarily eating less of it. It’s making sure the rest of your plate includes high-fiber foods like beans, lentils, vegetables, or whole grains to compensate.
Alcohol
Alcohol aggravates hemorrhoids through dehydration. It increases urine production, causing your body to lose fluid faster than usual. When you’re dehydrated, your large intestine compensates by pulling extra water out of stool as it passes through. The result is dry, hard stool that requires more effort to pass.
This effect is dose-dependent. A single glass of wine with dinner and plenty of water is unlikely to cause trouble. Several drinks over an evening, especially without matching water intake, can lead to a noticeably harder bowel movement the next day. For people with active hemorrhoids, that one difficult bowel movement can be enough to trigger bleeding or pain that lasts for days.
Caffeine in Large Amounts
Caffeine is a mild diuretic, meaning it increases urine output in a similar way to alcohol. In moderate amounts (a cup or two of coffee), the fluid in the coffee itself largely offsets this effect. But heavy caffeine consumption, particularly from energy drinks or multiple large coffees, can tip the balance toward dehydration and harder stools. If you’re already not drinking enough water, caffeine makes the problem worse.
Spicy Food: Less Harmful Than You Think
Spicy food has a reputation for worsening hemorrhoids, but the evidence doesn’t support it. A clinical study published in Diseases of the Colon & Rectum tested the effects of red hot chili pepper on people with hemorrhoidal symptoms and found that moderate use of chili pepper during a meal had no effect at all on symptoms. The researchers concluded there is no scientific reason to prevent people with hemorrhoids from enjoying a spicy dish.
Capsaicin, the compound that makes peppers hot, does activate nerve receptors in the digestive tract, which is why some people feel a burning sensation. But activating those receptors doesn’t increase swelling or bleeding in hemorrhoidal tissue. If spicy food gives you diarrhea, that’s a separate issue worth managing, since frequent loose stools can irritate the area. But the spice itself isn’t the culprit most people assume it is.
Iron Supplements
This isn’t a food, but it’s worth flagging because many people take iron supplements without realizing they cause constipation. High doses of iron, especially taken on an empty stomach, commonly cause constipation, abdominal pain, and nausea. If you’re taking iron for anemia and noticing harder stools or hemorrhoid flare-ups, talk to your provider about adjusting the dose, switching to a gentler form, or taking it with food.
Why Hydration Matters as Much as Food
Every food on this list causes problems at least partly through dehydration or hard stools. That means water intake is just as important as food choices. Fiber, in particular, needs adequate fluid to work properly. If you increase your fiber intake without drinking more water, the fiber can actually make constipation worse by adding bulk without enough moisture to move it through.
A practical target is 8 to 10 glasses of water per day, increasing as your fiber intake goes up. If you’re also drinking alcohol or caffeine, add extra water to compensate for the fluid you’re losing.
A Practical Approach
You don’t need to eliminate any single food to manage hemorrhoids. The pattern matters more than any individual meal. A diet built around processed, low-fiber foods with little water will produce hard stools consistently, and that consistency is what keeps hemorrhoids inflamed. Swapping in more fruits, vegetables, beans, and whole grains while staying well-hydrated addresses the root cause for most people.
If you’re dealing with an active flare-up, cutting back on alcohol, reducing red meat portions, and temporarily boosting fiber-rich foods can help stools pass more easily within a few days. Over the longer term, hitting that 14 grams of fiber per 1,000 calories target and keeping up with water intake is the most reliable way to prevent the straining that makes hemorrhoids worse.