What causes razor bumps?

Why does shaving make hair grow inward?

Shaving leaves a sharp end on each cut hair. A hair can emerge from its follicle, the small pocket it grows from, then curl back and pierce the skin. Alternatively, a hair cut too short can retreat beneath the surface and grow through the follicle wall. The surrounding skin reacts to the trapped hair. The medical name is pseudofolliculitis barbae.245

Razor bumps are especially common in Black men with tightly curled beard hair, but they affect people of any ethnicity and women too. They can appear on the face, neck, legs, armpits or pubic area. Straight hairs can also grow inward in skin folds or scarred skin. Waxing, tweezing and threading can cause ingrown hairs as well, so changing hair removal methods is not automatically a fix.2345

Are razor bumps the same as razor burn?

No. Razor burn is surface irritation from shaving, often appearing within minutes as a blotchy rash that burns or stings. Dry shaving, rushing and a dull blade can cause it. Razor bumps look more like individual pimples, sometimes with a visible trapped hair, and can itch or feel tender. Redness can be harder to see on black or brown skin. Razor bumps are not primarily an infection, although infection can develop alongside them.23456

How should you shave to prevent them?

1. 1Check which direction your hair grows, including under your chin, where the direction can change.
2. 2Wash with a gentle cleanser and rinse. Soften beard hair with a warm compress for five minutes or shave at the end of a shower.
3. 3Apply moisturizing shaving cream and leave it for one to two minutes. Keep it wet while shaving.
4. 4Use a sharp single blade or an electric razor. Shave with the hair growth without stretching your skin. Use short strokes and light pressure rather than chasing a perfectly smooth finish, which is a grooming preference, not a performance review.
5. 5Leave about 1 mm of stubble rather than shaving flush with the skin. Use as few passes as possible and rinse the blade after each stroke.
6. 6Rinse away the cream, then apply a cool, wet cloth. Stop using an aftershave if it burns or stings. Dry your razor and store it somewhere dry.

There is no single shaving schedule that suits both mechanisms. Leaving stubble and shaving every other day helps avoid cutting hairs too short. For men with darker skin whose beard hairs curl back as they lengthen, shaving daily or every two to three days can help instead. An electric shaver is worth trying instead of a blade razor, because a different tool can be more useful than giving the same shave another pep talk.135

What helps existing bumps, and how long does healing take?

Pause hair removal while the area is inflamed. Warm compresses several times a day can soothe existing ingrown hairs. Do not pick, squeeze or pluck them. Stopping shaving, waxing or tweezing usually lets inflammation settle over four to six weeks. New bumps can still appear initially as previously cut hairs grow inward; beard bumps can take up to three months to disappear completely.1345

For accompanying razor burn, use a cool washcloth and a fragrance free moisturizer. Aloe vera can ease discomfort but does not cure razor burn. Avoid alcohol, fragrance, apple cider vinegar and witch hazel on irritated skin. Ask a doctor before using acne medicines for the bumps, as some treatments can irritate skin.47

When should you get medical help?

See a doctor if the area is very painful, hot or swollen, or you have fever, chills or feel very unwell. See a dermatologist if bumps continue despite changing your shaving technique. Repeated inflammation can leave dark marks and permanent scars. Treatment can include prescription creams or antibiotics when infection is present; a healthcare professional can also release a trapped hair safely.1234