A sitz bath can help hemorrhoids shrink, but the effect depends on the type and severity of the hemorrhoid. For mild, early-stage hemorrhoids, consistent sitz baths reduce swelling and promote healing. For larger or more advanced hemorrhoids, a sitz bath relieves symptoms like pain and itching but is unlikely to eliminate the problem on its own.
How a Sitz Bath Affects Hemorrhoids
Sitting in a few inches of warm water relaxes the internal anal sphincter, the ring of muscle that controls the opening of the anus. When this muscle relaxes, blood flow to the swollen hemorrhoidal tissue improves and pressure on the veins decreases. That combination reduces engorgement, which is the primary cause of the bulging and discomfort you feel.
Warm water also soothes irritated tissue, eases muscle spasm, and keeps the area clean without the friction of wiping. These effects don’t cure the underlying cause of hemorrhoids (weakened vein walls, straining, prolonged sitting), but they create conditions that let mild hemorrhoids resolve on their own.
Which Hemorrhoids Respond Best
Small internal hemorrhoids, especially grade I (those that don’t prolapse outside the anal canal), respond well to conservative care that includes sitz baths. In one clinical trial, about 47% of patients with grade I internal hemorrhoids saw complete resolution after a course of sitz bath therapy combined with topical treatment. Grade II internal hemorrhoids, which prolapse during a bowel movement but retract on their own, showed little significant change in grading with the same approach.
External hemorrhoids can also benefit. The same trial found an 89% reduction in external hemorrhoidal mass size over the treatment period. That said, a thrombosed external hemorrhoid (one with a blood clot inside) may partially respond to sitz baths for pain relief, but the clot itself often needs days to weeks to reabsorb, and larger clots sometimes require a minor office procedure.
If you have grade III or IV hemorrhoids, where tissue prolapses and either needs to be pushed back in or stays permanently outside, sitz baths will help with comfort but won’t shrink them enough to make a meaningful difference. These typically require procedural treatment.
How to Take a Sitz Bath
Use warm water, not hot. The temperature should feel comfortable on the inside of your wrist, roughly the warmth of a relaxing bath. Water that’s too hot can irritate already inflamed tissue and increase swelling rather than reduce it.
Soak for 10 to 15 minutes at a time, two to three times per day, and always after bowel movements. Consistency matters more than duration. Soaking for 30 minutes won’t double the benefit, and extended soaking can soften the skin around the anus too much, making it more vulnerable to irritation.
You can use a portable sitz bath basin that fits over your toilet rim or simply sit in a few inches of water in your bathtub. Both work equally well. A study comparing different water delivery methods for post-hemorrhoid surgery care found no difference in pain relief or healing rates. The toilet-rim basin is more convenient for most people since you don’t need to fill and clean an entire tub multiple times a day.
Pat the area completely dry with a soft towel when you’re done. Leaving moisture against the skin can worsen itching.
Skip the Additives
Plain warm water is all you need. Despite their popularity, Epsom salts, essential oils, bubble bath, and other additives have no proven benefit for hemorrhoids. The Cleveland Clinic specifically notes that salts, oils, and other substances may actually cause inflammation. Unless a healthcare provider has prescribed a medicated sitz bath for a specific reason, stick with water alone.
What Else Helps Hemorrhoids Shrink
Sitz baths work best as part of a broader approach. Increasing your fiber intake to 25 to 30 grams per day softens stool and reduces the straining that made hemorrhoids worse in the first place. Drinking plenty of water supports that fiber. Avoiding sitting on the toilet for extended periods (put the phone down) removes sustained pressure on the veins.
Over-the-counter topical treatments containing ingredients that constrict blood vessels or reduce inflammation can complement sitz baths by targeting swelling from the outside. Witch hazel pads offer a mild astringent effect and can be used between baths for additional relief.
For most people with mild hemorrhoids, this combination of sitz baths, dietary changes, and topical care resolves the problem within one to two weeks. If swelling, pain, or bleeding persists beyond that, or if you notice a hard lump that doesn’t improve, the hemorrhoid likely needs more targeted treatment than warm water can provide.