A sitz bath with Epsom salts and warm water is one of the most effective home remedies for easing the pain and itchiness of a genital herpes outbreak. The American Academy of Dermatology recommends soaking for 10 to 20 minutes to cleanse sores, reduce tenderness, and relieve itching. You can use a shallow basin that fits over your toilet or simply sit in a few inches of water in your bathtub.
What to Add to the Water
Epsom salt (magnesium sulfate) is the most widely recommended additive. Use about two cups dissolved in a full tub of warm water, or scale down proportionally if you’re using a smaller sitz bath basin. The salt helps draw moisture from inflamed tissue, which can reduce swelling around sores and create a less hospitable environment for bacteria that might cause a secondary infection.
Baking soda is another common option. Adding a few tablespoons to warm water can soothe itching and help dry out weeping lesions. Some people alternate between Epsom salt and baking soda baths, or combine them, though plain warm water on its own still provides meaningful relief. Colloidal oatmeal, the finely ground oatmeal sold for baths, can also calm irritated skin, though it’s better suited for itching than for cleaning open sores.
Avoid anything with fragrance, dyes, or harsh chemicals. Bubble bath, scented bath salts, essential oils like tea tree oil, and soap-based products can all irritate open herpes lesions and make pain worse. If you want to cleanse the sores themselves, use a mild, unscented soap applied gently by hand, not submerged in the bath water.
Getting the Water Temperature Right
Aim for warm water around 104°F (40°C), which is roughly the temperature of a comfortably warm bath. The warmth increases blood flow to the area, which supports healing and can temporarily ease pain. Water that’s too hot will burn already sensitive, broken skin. If you don’t have a thermometer, test the water with the inside of your wrist. It should feel warm but not uncomfortable to hold your skin against.
How Long and How Often to Soak
Each soak should last 10 to 20 minutes. Longer than that and you risk over-softening the skin around your sores, which can delay healing. Two to three baths per day is a reasonable frequency during the most painful phase of an outbreak, typically the first few days when sores are open and weeping. As sores begin to crust over and dry out, you can reduce to once a day or stop if you’re no longer getting relief.
If you’re using a sitz bath basin rather than a full tub, fill it with enough warm water to cover the affected area. These basins hold about a quart to a half-gallon, so you’ll only need a couple of tablespoons of Epsom salt rather than two full cups.
What to Do After the Bath
How you dry off matters as much as the soak itself. Pat the area gently with a clean, soft towel. Don’t rub. Some people find it easier to use a hair dryer on the cool or low-heat setting, held several inches away, to dry the area without any friction at all. Air drying speeds healing, so avoid bandaging or covering the sores afterward. Wear loose, cotton underwear to keep the area ventilated.
Wash your towel after each use and don’t share it with anyone in your household. While herpes transmission from towels is unlikely, keeping your bath linens separate is a sensible precaution when you have open sores.
Why Sitz Baths Help During an Outbreak
Herpes sores go through a predictable cycle: blisters form, break open into shallow ulcers, then crust over and heal. The open-ulcer stage is when pain peaks and when sores are most vulnerable to bacterial infection from normal skin bacteria. A sitz bath gently cleans away discharge and dead skin without the friction of wiping, which can reopen healing tissue. The warm water also relaxes pelvic muscles, which helps if urination has become painful because of sores near the urethra.
Sitz baths don’t shorten an outbreak or replace antiviral medication. They’re a comfort measure. If your outbreaks are frequent or severe, prescription antivirals can reduce both the duration and frequency of flare-ups. But for the days when sores are at their worst, a simple soak in warm salt water is one of the most accessible ways to manage the discomfort at home.