An ingrown hair is a strand of hair that curls back on itself and grows into the skin instead of rising up through the surface. The result is a small, often irritated bump that can appear anywhere you shave, wax, or tweeze. Ingrown hairs are extremely common, usually harmless, and typically resolve on their own, but they can become painful or infected if left unchecked.
How Ingrown Hairs Form
Hair grows from follicles beneath your skin. When you shave, wax, or tweeze, you remove the visible strand but leave the follicle intact. As a new hair regrows from that follicle, it sometimes curls back toward the skin and pierces it rather than growing outward. The body treats this re-entry like a foreign object, triggering an inflammatory reaction around the trapped hair.
This is why you can sometimes see the hair itself sitting just beneath the surface, curving in a small loop. The sharper the cut end of the hair (which shaving creates), the easier it is for that tip to puncture back through skin. Waxing and tweezing create a slightly different problem: the new hair grows in with a finer tip but may still get trapped under a layer of dead skin cells before it can break through.
What They Look and Feel Like
Ingrown hairs typically show up as tiny, swollen bumps in areas where you remove hair. They can look like small pimples or blisters, and some fill with pus. Others appear as darker spots compared to the surrounding skin, a form of hyperpigmentation that’s especially noticeable on deeper skin tones. You might feel itching, tenderness, or mild pain at the site.
One telling sign is a visible hair trapped beneath the bump, curving in a loop shape. That looped hair is the strand that failed to exit the follicle cleanly and instead burrowed sideways or downward into the skin.
Who Gets Them Most Often
Anyone who removes body hair can develop ingrown hairs, but some people are significantly more prone to them. People with curly or coarse hair have the highest risk because their hair naturally curves as it grows, making it far more likely to re-enter the skin. Thicker skin and more active oil glands also increase the likelihood.
When ingrown hairs become a chronic, recurring problem in the beard area, the condition is called pseudofolliculitis barbae. It’s especially common in men with tightly curled hair who shave regularly. The cut hairs curl inward at a sharp angle and pierce the skin, producing clusters of inflamed bumps that can be mistaken for acne. Although the resulting pustules are usually sterile (not infected), secondary bacterial infections can develop if the skin is repeatedly irritated.
Common Causes and Triggers
The biggest trigger is the method of hair removal itself. Shaving, waxing, and tweezing all leave the follicle active, so new hair will always grow back with the potential to become trapped. Several specific habits make the problem worse:
- Shaving against the grain. Cutting hair in the opposite direction of growth creates a sharper, angled tip that penetrates skin more easily.
- Using a dull razor. A dull blade tugs at hair rather than cutting it cleanly, increasing irritation and the chance of uneven regrowth.
- Skipping shave cream or gel. Dry shaving increases friction and irritation, both of which contribute to ingrown hairs.
- Tight clothing. Fabrics that press against freshly shaved skin can push regrowing hairs back into the surface, particularly in the bikini area and along the neck.
- Dead skin buildup. When old skin cells accumulate over a follicle opening, they can block the new hair’s path and force it to grow sideways.
How to Prevent Them
Prevention comes down to reducing the chances that a regrowing hair gets trapped. Before shaving, wet the skin with warm water and always apply a shaving gel or cream to minimize friction. Shave in the direction your hair grows, not against it, and use a sharp razor. Replace blades regularly.
Between shaves, gentle exfoliation makes a real difference. Regularly scrubbing the area with a soft washcloth or a mild exfoliating product clears away dead skin cells that would otherwise block follicle openings. This speeds up your skin’s natural cell turnover and helps new hairs push through cleanly. If you’re prone to ingrown hairs in a specific area, making exfoliation part of your routine there is one of the simplest and most effective strategies.
Some people find that simply shaving less frequently helps, because it gives hairs more time to grow past the skin’s surface before the next shave. Using an electric trimmer that doesn’t cut as close to the skin is another option for reducing the sharp-tipped regrowth that causes problems.
Treating an Existing Ingrown Hair
Most ingrown hairs resolve without treatment within a week or two. The hair eventually works its way out of the skin, and the inflammation settles down. Resist the urge to dig at the bump with tweezers or a needle, which can introduce bacteria and cause scarring.
To speed things along, apply a warm, damp washcloth to the area for several minutes. The warmth softens the skin and can help the trapped hair reach the surface. Once you can see a loop of hair above the skin, you can gently lift it free with clean tweezers, but don’t pluck it out entirely or you’ll restart the cycle.
Chemical Exfoliants
Over-the-counter products containing salicylic acid or glycolic acid are particularly useful for treating and preventing ingrown hairs. Salicylic acid works by clearing away dead skin cells, unclogging pores, and reducing redness and irritation. It also has antimicrobial properties that help keep bacteria from colonizing the irritated skin. Glycolic acid takes a slightly different approach: it loosens the bonds between dead skin cells so they shed more easily, giving trapped hairs a clearer path to the surface. Both acids also reduce inflammation, which helps calm the redness and swelling around an ingrown hair.
Look for serums, toners, or post-shave products that list either ingredient. Apply them to the affected area after cleansing. You may notice softer, smoother skin within a few days as fresh skin cells replace the old buildup.
When Ingrown Hairs Get Infected
An ingrown hair that stays inflamed for too long can develop a secondary bacterial infection, turning into a deeper, more painful bump. Signs of infection include increasing redness that spreads beyond the bump, worsening pain, warmth at the site, and pus that looks yellow or green. In rare cases, an infected ingrown hair can progress to a small abscess that needs to be drained.
If the area becomes significantly more red or painful over the course of a few days, or if you develop a fever or chills, that’s a sign the infection is spreading and needs medical attention. Most simple infections clear up with topical or oral antibiotics, but widespread or recurring infections sometimes point to a deeper follicle issue that needs further evaluation.
Laser Hair Removal as a Long-Term Option
For people who deal with ingrown hairs constantly, particularly those with pseudofolliculitis barbae, laser hair removal offers a more permanent solution. The laser targets and destroys the hair follicle itself, so the hair can’t regrow and become trapped. A single treatment session can destroy 80 to 90 percent of targeted follicles, though most people need multiple sessions spaced weeks apart because hair grows in cycles and not all follicles are active at the same time.
Laser hair removal works best on dark hair against lighter skin, though newer laser technologies have expanded the range of skin tones that respond well. It’s more expensive upfront than razors or wax, but for chronic sufferers, eliminating the source of the problem can be worth the investment. Electrolysis is another permanent option that works on all hair colors and skin types, though it treats one follicle at a time and takes longer to cover large areas.
Scarring and Hyperpigmentation
Repeated ingrown hairs in the same area can leave behind dark spots or small scars, especially on darker skin tones. The inflammation triggers excess melanin production, creating patches that are noticeably darker than the surrounding skin. These marks usually fade over weeks to months once the ingrown hairs stop recurring, but picking at or squeezing bumps makes scarring significantly worse. Chemical exfoliants containing glycolic acid can help speed the fading process by encouraging fresh, evenly pigmented skin cells to replace the discolored ones.