A sitz bath is a shallow soak in warm water that covers just your hips and buttocks, designed to relieve pain, swelling, and irritation in the area between your genitals and anus (the perineum). You can do one in your bathtub or with a small plastic basin that fits over your toilet seat. The whole process takes about 15 to 20 minutes, requires no special skills, and can be repeated several times a day.
What You Need
You have two options: your bathtub or a dedicated sitz bath basin. The basin is a shallow, curved plastic bowl sold at most pharmacies for around $10 to $20. It sits securely on top of your toilet rim, which makes it easier to get in and out of than a bathtub, especially if you’re recovering from surgery or childbirth. Some kits include a small plastic bag with tubing that lets you add warm water during the soak to maintain the temperature.
If you use your bathtub, you only need about 3 to 4 inches of water. There’s no need to fill the tub. Either way, all you truly need is clean warm water and a soft towel.
Step-by-Step Instructions
Start by cleaning whatever you’re using. If it’s a sitz bath basin, wash it with mild soap and rinse thoroughly before each use. If it’s your bathtub, give it a quick scrub so you’re not soaking in soap residue or cleaning product.
Fill the basin or tub with warm water. The water should feel comfortably warm on the inside of your wrist, similar to what you’d use for a baby’s bath. A good target is around 100°F (38°C). Water that’s too hot can burn sensitive, already-irritated skin, and water that’s too cool won’t provide the soothing effect you’re after. If you’re using a toilet-mounted basin, place it on the rim with the seat up and make sure it’s stable before sitting down.
Lower yourself gently into the water so your perineal area is fully submerged. Your legs and upper body stay out of the water. If you’re using a bathtub, you can bend your knees or let your legs hang over the edge, whatever is comfortable. Soak for 15 to 20 minutes. If the water cools down noticeably, you can drain a little and add more warm water to keep it at a comfortable temperature.
When you’re done, stand up slowly (warm water can make you a bit lightheaded). Gently pat the area dry with a clean, soft towel. Don’t rub. Rubbing can re-irritate the tissue you just spent 20 minutes soothing. Some people prefer to air dry or use a hair dryer on the lowest, coolest setting held at a distance. Put on loose, breathable cotton underwear afterward.
How Often to Do a Sitz Bath
For most conditions, two to four sitz baths per day provides meaningful relief. A good routine is after each bowel movement (when hemorrhoids or fissures tend to flare) and once or twice more during the day. After childbirth, many people find that three times a day plus after bathroom use works well during the first week or two of recovery.
There’s no strict limit on how many days you can continue. Most people use sitz baths for one to two weeks while an acute issue heals. If your symptoms haven’t improved after a week of consistent use, that’s a signal something else may be going on.
Adding Epsom Salt or Other Ingredients
Plain warm water works well on its own, and that’s all most healthcare providers recommend. If you want to add Epsom salt, use about 2 tablespoons per gallon of water, or roughly a quarter cup for a shallow bathtub soak. Epsom salt can help reduce swelling and may feel more soothing than plain water for some people. Baking soda in similar small amounts is another common addition that can ease itching.
Avoid adding bubble bath, fragranced bath products, essential oils, or any soap to the water. These can irritate already-inflamed tissue and increase the risk of infection, which defeats the entire purpose. If your provider has prescribed a specific medicated solution or antiseptic to add, follow their instructions on the amount.
Why a Sitz Bath Helps
Warm water increases blood flow to the tissues it touches. That improved circulation brings more oxygen and immune cells to the area, which supports healing. At the same time, the warmth relaxes the muscles around the anus and perineum. For anal fissures (small tears in the lining of the anus), this muscle relaxation is especially important because tightness in the surrounding muscles can slow healing and worsen pain. The gentle warmth also temporarily reduces nerve sensitivity, which is why the relief often feels immediate even if the underlying issue takes days to fully heal.
Common Reasons People Use Sitz Baths
Hemorrhoids are the most common reason. Whether you’re dealing with swollen veins from constipation, pregnancy, or prolonged sitting, a sitz bath reduces pain and swelling. If you’ve recently had hemorrhoids surgically removed, sitz baths are typically part of your recovery plan to manage post-procedure discomfort.
Postpartum recovery is the second major use. After vaginal delivery, perineal soreness and swelling are nearly universal, and they’re more pronounced if you had tearing or an episiotomy. Sitz baths help relieve that pain and speed up healing. Even after a C-section, some people experience perineal discomfort and benefit from soaking.
Anal fissures respond well to sitz baths because the warm water relaxes the internal sphincter muscle, reducing spasm and allowing the tear to heal. Bartholin cysts, which form near the vaginal opening when a gland becomes blocked, can sometimes soften and drain more easily with regular warm soaks. Sitz baths are also commonly recommended after other surgeries in the perineal or rectal area.
Keeping Things Clean and Safe
Wash your sitz bath basin with soap and water after every single use, then let it air dry completely. Bacteria thrive in warm, moist environments, and a basin that sits damp between uses can introduce infection to the very area you’re trying to heal. If you share a bathtub with others, clean it before filling it for your soak.
Always test the water temperature before sitting down. This is especially important if you have reduced sensation in the area due to nerve damage, numbness from a recent epidural, or diabetes-related nerve changes. Burns from overly hot water are the most preventable risk of a sitz bath. If your skin in the area starts looking more red or irritated after soaking, or if you develop new pain, warmth, or discharge, stop the sitz baths and get the area evaluated.
One practical note: if you’re using the toilet-mounted basin, the water will overflow into the toilet bowl as you sit down. This is by design. Place a towel on the floor in front of the toilet just in case, and make sure the basin is centered so it drains properly rather than spilling onto the bathroom floor.