Ingrown hairs after shaving — how to stop them

An ingrown hair is a hair that grew back into the skin instead of out of it. It shows up as a small raised bump, usually a few days after you shave. Look closely and you can often see the hair coiled just below the surface. It is not an infection, it is not a spot, and squeezing it never helps. The cause is almost always the same: shaving against the grain, using a dull blade, or shaving too close. Fix those three, close the skin properly after each shave, and ingrown hairs largely stop happening.

How an ingrown hair forms

Every hair on your body grows out of a small opening in the skin called a follicle. Normally the hair grows up and out.

When you shave, the razor cuts the hair. If the blade cuts the hair below the top of the skin (which happens easily when you shave against the direction of growth), the cut end of the hair now sits inside the follicle. As it grows back, it can bend and press against the side of the follicle instead of going straight up. That is an ingrown hair.

You will feel a small hard bump. Sometimes you can see a dark speck: the coiled hair, trapped under the surface. Around the bump the skin often turns pink because the follicle is inflamed.

Why they show up more in some places

Bikini line, underarms, and the neck (for men) get more ingrown hairs than legs. Two reasons: the hair in those areas is coarser and curlier, and those areas have more friction from underwear, tight clothing, or collars. Coarser hair is more likely to bend as it regrows. More friction irritates the follicle further.

Legs get fewer ingrown hairs because leg hair is straighter and finer, and the skin there sees less constant friction.

What causes them: the three biggest triggers

1. Shaving against the grain. This lifts the hair before cutting it, then leaves the cut end below the surface. Almost every ingrown-hair problem improves within a few shaves once you switch to shaving in the direction of the hair growth.

2. Dull blades. A dull blade pulls at the hair before cutting it. The pull lifts the hair up, then the cut end sinks back below the surface. Fresh blades cut cleanly at the top.

3. Shaving too close, too often. Multiple passes over the same spot to get the closest possible shave means cutting the hair shorter and shorter, until it is short enough to trap under the surface.

All three add up. Fix all three and the follicle heals within a week.

How to stop new ingrown hairs

1. Shave with the grain. Look at the direction the hair grows in each area (legs: downward, underarms: mixed, bikini line: down and outward). Shave in that direction.
2. Use a fresh, sharp blade. Change blades often. A dull blade is the fastest way to cause new ingrown hairs.
3. Use shaving cream or gel. Proper lubrication lets the blade glide instead of drag.
4. Do not over-shave a single spot. One or two passes maximum. If you miss a hair, leave it for tomorrow.
5. Close the skin after each shave. An alum stone tightens the top layer of skin so the follicle is not left wide open for the next few hours. Wet the stone, glide over the freshly shaved area, rinse.
6. Wear loose clothes for the next hour. Tight friction on freshly shaved skin is one of the main reasons hairs get pressed sideways instead of growing straight out.

Follow all six for two weeks. Most people see a big reduction by the end of week one.

Once-a-week gentle exfoliation

A soft washcloth in the shower, or a mild lactic-acid body lotion once a week, helps lift the top layer of dead skin cells. This makes it easier for new hairs to break the surface as they grow.

Not daily. Not with a scrub. Once a week, gently. Over-exfoliation causes more inflammation, not less.

What to do with the ingrown hairs already there

Do not squeeze. Ever. It pushes the hair deeper and can cause an infection.

Do not pick with tweezers. If the hair is fully coiled under the surface, digging it out breaks the skin and often makes the bump much worse.

Warm compress. A clean cloth soaked in warm water, held over the bump for a couple of minutes, softens the top layer. Sometimes the hair works itself out on its own within a day or two.

Stop shaving the area. Give the follicle three to five days without a razor. Let the hair grow out enough to work itself free.

Then start the six-step routine above from the next shave. This breaks the cycle.

When to see a doctor

Ingrown hairs are cosmetic. They are annoying but not medical. See a doctor if:

• A bump has visible pus, is very painful, and is growing.
• Bumps keep coming back in the same spot every month, suggesting a chronic follicle problem (folliculitis or pseudofolliculitis barbae).
• You have diabetes or a weakened immune system, in which case any inflamed skin should be checked earlier rather than later.

Alum stone and ingrown hairs

Alum does not remove existing ingrown hairs. What it does is prevent new ones from forming as often. By closing the top layer of skin right after each shave, the follicle is less likely to be pushed sideways by friction in the following hours, and less likely to trap the newly-cut hair.

The Lyscia Crystal is a solid piece of pure potassium alum. Wet, glide over freshly shaved skin, rinse. Same routine every shave.

Frequently asked questions

How long does an ingrown hair take to go away?

Left alone, one to three weeks. It goes away faster if you stop shaving that spot, warm-compress it once a day, and do not pick.

Are ingrown hairs the same as razor bumps?

Related. Razor bumps are the general term for red raised spots after shaving; ingrown hairs are a specific type where a hair is trapped under the skin. Both come from the same underlying causes and both improve with the same routine.

Can I get ingrown hairs from waxing?

Yes. Any hair-removal method that cuts, pulls, or breaks the hair below the surface can cause ingrown hairs. The prevention routine is similar.

Does exfoliating every day help?

No. Once a week, gentle. Daily scrubbing irritates the follicle and can cause more bumps.

Are ingrown hairs contagious?

No. They are a mechanical problem with hair growth, not an infection.