A small red bump on the neck or jawline, sometimes with a hair visible under the skin: it is often an ingrown hair. It appears when a hair cut very short grows back curling into the skin instead of coming out. Curly beards are more prone to it, but it can happen to anyone.
In short
Ingrown hairs mostly come from shaving too close: hair cut short, skin stretched, shaving against the grain. You lower the risk by shaving a beard that is wet with lukewarm water, with the grain, with a sharp blade and leaving a little length. An exfoliant with glycolic or salicylic acid can help as a regular step, with sunscreen during the day.
Why the hair curls back
The shorter and more sharply angled the cut, the more likely the tip of the hair is to re-enter the skin as it grows. The reviews by Ogunbiyi (2019) and by Gray and McMichael (2016) describe this: the risk rises with close shaving and is greater with naturally curly hair. The NHS puts it plainly: the most effective way to avoid ingrown hairs is not to shave at all. If that is not an option, your shaving habits are what count.
The shaving habits that help
- Beard wet with lukewarm water, with a shaving gel. The NHS advises wetting the skin with warm water before applying the gel. Never shave dry.
- With the grain, not against it. This is one of the most consistent pieces of advice in the sources cited here.
- Do not stretch the skin. Pulling the skin taut to get closer cuts the hair below the surface, which encourages it to grow back under the skin.
- A sharp blade, few strokes. The NHS advises rinsing the blade after each stroke and replacing it as soon as it goes blunt.
- Do not shave too close. The NHS says that leaving about 1 mm of stubble can help. A trimmer set short is worth trying.
The same habits also limit the burning feeling after shaving: we go through them in razor burn.
Exfoliant: a regular step, not an emergency fix
The NHS mentions exfoliation to help free trapped hairs. Ogunbiyi’s review cites products that refine the skin’s surface, including salicylic acid and alpha hydroxy acids (AHAs). An older study by Perricone (1993), in 35 men, compared a glycolic acid lotion with a placebo: the shaved area looked better with glycolic acid. It is a small study, to be read as a hint, not a promise.
In practice, an exfoliant is used as a regular step, a few evenings a week, not as a one-off fix on a single bump. AHAs make the skin more sensitive to the sun, as the FDA points out: sunscreen during the day, without exception. To choose between glycolic and salicylic acid, see AHA or BHA: which exfoliant to choose.
What is best avoided
- Scratching, picking or squeezing. The NHS advises against touching an ingrown hair: it damages the skin and makes it more likely the area becomes inflamed.
- Running the blade over an already irritated area. Better to space out your shaves while the skin settles; the NHS advises shaving less often when you can.
When to get advice
If a bump becomes very painful, hot or swollen, if the area bleeds, or if bumps keep coming back despite these habits, see a doctor or a dermatologist.
The last word
Less close, with the grain, on a wet beard, with a sharp blade: that is the foundation. The exfoliant comes next, as a regular step and with sunscreen. For a routine suited to your skin and your shaving, start with the free skin quiz: your photo, a few questions, and you see your skin type.
Frequently asked questions
Should I pull out an ingrown hair with tweezers?
The NHS advises against scratching, picking or squeezing an ingrown hair, because it damages the skin. If a bump is very painful, hot or swollen, see a doctor.
Is an exfoliant enough to get rid of ingrown hairs?
No. It can help as a regular step, but shaving habits remain the foundation. The measure the NHS describes as the most effective is not shaving.
Multi-blade razor or single blade?
The review by Gray and McMichael (2016) finds no strong evidence in favour of the single blade. What matters most is still a sharp blade, few strokes and unstretched skin.
Why wear sunscreen if I use an exfoliant?
Because AHAs, such as glycolic acid, make the skin more sensitive to the sun. The FDA recommends sun protection while using them.