What an ingrown hair is
An ingrown hair is a hair that grows back into the skin instead of out through it. It can happen in two main ways. In one, the hair curls and re-enters the skin after it exits the follicle. In the other, the hair never makes it out and grows sideways beneath the surface, sometimes because dead skin cells cover the opening.
The skin treats the trapped hair as a foreign object, which leads to a small, sometimes itchy, tender or red bump. Some look like pimples with a tiny pus-filled tip. Others are just a dark spot or a firm bump with a hair visible beneath the surface.
Ingrown hairs can occur anywhere hair grows, but they are most often noticed where people remove hair: the face and neck, underarms, legs, bikini area and pubic region.
Why they form
Anything that changes how a hair emerges can contribute.
- Shaving, especially close shaving. Cutting a hair at a sharp angle below skin level can leave a pointed tip that pierces the skin as it grows. Stretching the skin tight while shaving may make the hair retract slightly below the surface.
- Waxing, tweezing and epilating. Pulling out the hair can leave a weakened follicle and new hair that has trouble finding its way out.
- Curly or coarse hair. Tightly curled hair is more likely to bend back toward the skin. This is why people with curly hair often have more trouble, though anyone can get them.
- Dead skin buildup. A layer of dry skin over the follicle can block the hair’s exit.
- Friction. Tight clothing, repeated rubbing or sweaty fabrics can push hairs in the wrong direction. Skin that is irritated may swell around the follicle and make it harder for hair to emerge.
None of this is a sign of poor hygiene.
Gentle care that tends to help
Most ingrown hairs settle on their own over days to a few weeks if the area is left alone. A calm, gentle approach is usually the best one.
- Stop removing hair from the area for a while, if you can, to let the skin settle.
- Wash gently with a mild cleanser and warm water, rather than very hot water. Our article on shower habits explains why heat can add to irritation.
- Use a warm compress. A clean, warm, damp cloth held against the area for a few minutes may soften the skin and help a hair work its way out.
- Moisturize. Keeping skin soft can make it easier for hairs to emerge. A simple moisturizer is usually enough; choosing between body lotion, cream or ointment depends on how dry the area is.
- Wear loose clothing over the area when possible to reduce rubbing.
- Exfoliate lightly, if at all. A soft washcloth or a gentle chemical exfoliant used occasionally can help remove dead skin cells, but harsh scrubbing is counterproductive. Overdoing it can lead to skin over-exfoliation, and an irritated barrier makes bumps look worse. The wider topic of exfoliation frequency applies here: less often is a safer starting point.
If you decide to use an acid product, remember that salicylic acid and alpha hydroxy acids such as glycolic acid can sting on shaved or already irritated skin. Patch testing and avoiding them right after hair removal are sensible precautions.
What to avoid
The temptation to dig is strong, but a few things tend to make matters worse.
- Picking, squeezing or digging with tweezers or needles. This can introduce bacteria, cause infection and leave dark marks or scars. If a hair is clearly visible and loops near the surface, some people gently lift it out with clean, sterile tweezers, but do not dig beneath the skin. When in doubt, leave it alone.
- Shaving over the bump. This can cut the bump, irritate it and extend healing.
- Scrubbing hard. Rough brushes or strong exfoliants will inflame the area.
- Tight clothing and friction over the affected areas.
- Using harsh home remedies. Skin on shaved areas is more easily irritated.
Preventing new ones
You cannot always prevent ingrown hairs, but some habits may reduce them. Our guide to razor irritation and shaving comfort covers the details for shavers, and in short:
- Shave after a warm shower, when hair is softer.
- Use a sharp, clean razor and replace blades or heads regularly.
- Shave in the direction of hair growth, not against it, especially if you are prone to bumps.
- Avoid pulling skin tight and avoid going over the same spot many times.
- Rinse and moisturize afterward.
Some people choose to let hair grow longer or use trimmers that leave a little length, which reduces the chance that the hair will curl back. Others choose different hair removal methods, such as creams or professional treatments, but each carries its own risks of irritation, so patch testing and following instructions matter. This applies especially to skincare for men who shave the neck daily.
Dark marks afterward
After a bump settles, a flat darker spot may remain, particularly on deeper skin tones. This is a type of hyperpigmentation caused by inflammation. It tends to fade slowly over weeks to months, and daily sunscreen on exposed areas can help prevent it from darkening. Picking tends to make marks last longer.
When to see a professional
Most ingrown hairs are minor, but see a doctor, pharmacist or dermatologist if:
- The area becomes very painful, hot, swollen or oozes pus, which can signal infection.
- Bumps are widespread, keep coming back or form hard, painful lumps.
- You develop fever or red streaks spreading from the area.
- Scarring or thickened dark marks are developing.
- You are not sure whether the bumps are ingrown hairs or something else, such as folliculitis or another condition.
A professional can treat infected areas properly and advise on longer-term options for persistent problems. Outcomes vary, and patience matters since hairs often take time to work free.