Preventing ingrown hairs comes down to how you remove hair, what you do to your skin before and after, and whether you’re genetically prone to the problem in the first place. Ingrown hairs, known clinically as pseudofolliculitis barbae (PFB) when they occur in shaved areas, happen when a hair curls back or grows sideways into the skin instead of rising cleanly out of the follicle. The good news is that most cases respond well to straightforward changes in grooming habits, and catching them early keeps them from progressing into painful, inflamed bumps or dark spots.
What Actually Causes an Ingrown Hair
An ingrown hair forms in one of two ways. In the first, a freshly cut hair retracts slightly below the skin’s surface, then curves as it regrows and pierces the follicle wall from the inside. In the second, the hair exits the follicle normally but curls back and penetrates the surrounding skin. Either way, the body treats the re-entering hair tip like a foreign object, triggering inflammation that shows up as a red or skin-toned bump, sometimes with visible pus.
Curly or coiled hair is far more likely to cause this problem, which is why ingrown hairs disproportionately affect people of African descent. Research has identified a specific genetic variation in a keratin protein found in the hair follicle’s companion layer that adds to the risk. People who carry this variant have hair that is structurally more prone to curling back into the skin after being cut.1Journal of Investigative Dermatology. An Unusual Ala12Thr Polymorphism in the 1A α-Helical Segment of the Companion Layer-Specific Keratin K6hf: Evidence for a Risk Factor in the Etiology of the Common Hair Disorder Pseudofolliculitis Barbae But anyone who shaves, waxes, or tweezes can develop ingrown hairs, regardless of ethnicity or hair type. Tight clothing, friction from athletic gear, and shaving against the grain all increase the odds.
The Single Most Important Prevention Step: Rethink Your Razor
If you’re using a multi-blade cartridge razor and dealing with ingrown hairs, the razor itself may be the biggest part of the problem. Multi-blade razors are designed to lift the hair slightly out of the follicle before cutting it. That “lift-and-cut” action sounds like it should give you a closer shave, and it does. But when the cut hair snaps back, it retracts below the skin surface, which is exactly the setup that leads to the hair curling into the follicle wall as it regrows.2JAAD Reviews. Insights into the role of grooming modifications and preventative approaches in Pseudofolliculitis barbae: A narrative review of hair removal practices
Switching to a single-blade safety razor or a guarded trimmer that leaves stubble slightly above the skin surface is one of the most effective changes you can make. It won’t feel as “smooth” immediately after shaving, but the trade-off is dramatically fewer ingrown hairs. Electric clippers or foil shavers set to leave a millimeter or so of hair are another solid option. The goal is to avoid cutting the hair below the skin line.
How to Shave When You’re Prone to Ingrown Hairs
Beyond tool choice, the way you prepare your skin and execute the shave makes a real difference. Here’s a practical routine that addresses each stage where things tend to go wrong:
- Soften the hair first: Shave during or right after a warm shower. Hydrated hair is weaker and cuts more cleanly, which reduces the sharpness of the cut tip. If you can’t shower, press a warm, damp cloth against the area for a couple of minutes. Research on shaving technology has consistently emphasized that maintaining hair softness throughout the shave is one of the most important factors in reducing post-shave irritation.3British Journal of Dermatology. Male skin and ingredients relevant to male skin care
- Use a lubricating shave gel or cream: A thick, non-foaming product helps the blade glide and protects the skin from micro-tears. Avoid alcohol-based products that dry out the skin.
- Shave with the grain: Run your hand over the stubble to figure out which direction your hair grows. Shave in that direction. Going against the grain gives a closer cut, but it also increases the chance the hair retracts beneath the surface. If one pass isn’t enough, go across the grain on a second pass rather than directly against it.
- Light pressure, single strokes: Let the weight of the razor do the work. Pressing down hard or repeatedly going over the same spot irritates the skin and cuts the hair shorter than necessary.
- Rinse and hydrate after: Rinse with cool water to calm the skin, then apply a fragrance-free moisturizer. Restoring hydration to the skin after shaving helps the barrier recover and reduces the inflammation that makes ingrown hairs worse.3British Journal of Dermatology. Male skin and ingredients relevant to male skin care
One habit worth breaking: daily shaving. If ingrown hairs are a recurring problem, shaving every other day or every third day gives existing hairs time to grow past the point where they’d curl back in. Even skipping one day between shaves can help.
Chemical Exfoliation Between Shaves
Between shaves, the skin over a healing follicle can trap a regrowing hair beneath it, creating an ingrown. Chemical exfoliants help prevent that by keeping the top layer of dead skin cells thin enough for hairs to push through naturally. Products containing salicylic acid or glycolic acid are the most widely used over-the-counter options. Salicylic acid is oil-soluble, so it gets into the pore lining itself, while glycolic acid works on the skin surface. Either one, applied once daily to areas prone to ingrown hairs, can meaningfully reduce how often they form.
Retinoids are another option. Tretinoin and adapalene speed up skin cell turnover, which prevents the dead-skin “cap” from forming over a follicle opening. These are available by prescription (tretinoin) or over the counter in lower strengths (adapalene). They can be irritating at first, so starting with every-other-day application and building up is the usual approach. If you’re already using an exfoliating acid, adding a retinoid on top of it can be too much for the skin. Pick one strategy and give it a few weeks before adding the other.
Spotting and Treating Ingrown Hairs Early
Catching an ingrown hair in its earliest stage is the difference between a bump that resolves quietly and one that turns into a dark mark or scar. The first sign is usually a small, slightly tender bump that appears a day or two after shaving. It might look like a pimple, but you can sometimes see the hair curling just under the surface if you look closely.
At this stage, the best thing you can do is leave it alone. Resist the urge to dig at it with tweezers or a needle. Instead, apply a warm compress for five to ten minutes to soften the skin and encourage the hair to surface on its own. If you’re using a chemical exfoliant, continue applying it to the area. Once the hair tip is visible and clearly above the skin surface, you can gently lift it free with clean, sterilized tweezers, but don’t pluck it out entirely or you’ll restart the cycle.
For bumps that are already inflamed, a thin layer of over-the-counter hydrocortisone cream can take down the redness and swelling. Benzoyl peroxide at low concentrations can help if the bump looks like it’s becoming infected. If you’re seeing multiple inflamed bumps that aren’t resolving after a week or two of home care, or if any bump develops significant pus, warmth, or streaking redness, that’s the point to see a dermatologist. Secondary bacterial infection of ingrown hair bumps is a real risk, and occasionally oral antibiotics are needed.
When Topical Treatments Aren’t Enough
For people who get ingrown hairs despite doing everything right with shaving technique and exfoliation, the problem is often that their hair structure makes ingrowns almost inevitable with any form of shaving. In those cases, the conversation shifts from “how to shave better” to “how to reduce the number of hairs growing in that area.”
Eflornithine cream (sold under the brand name Vaniqa) is a prescription topical that slows hair regrowth by blocking an enzyme involved in hair growth. It doesn’t remove hair; it just makes hair grow back more slowly and come in finer.4PubMed Central. A method to improve the efficacy of topical eflornithine hydrochloride cream Applied twice daily to a problem area, it can reduce the frequency of ingrown hairs by giving you more time between shaves. The catch is that it only works as long as you keep using it, and it takes several weeks to see results.
Eflornithine also works well as an add-on to laser hair removal. In a randomized trial, the side of the face treated with laser plus eflornithine showed about a 99.5% median reduction in hair count after 16 weeks, compared with roughly 85% on the side treated with laser plus a placebo cream.5PubMed. Topical eflornithine hydrochloride improves the effectiveness of standard laser hair removal for treating pseudofolliculitis barbae: a randomized, double-blinded, placebo-controlled trial That combination produced a statistically significant drop in both hair density and the number of inflammatory bumps compared to either treatment used alone.6PubMed. Pseudofolliculitis barbae treatment: Efficacy of topical eflornithine, long-pulsed Nd-YAG laser versus their combination
Laser Hair Removal for Chronic Ingrown Hairs
Laser hair removal is currently the most effective long-term solution for people with stubborn, recurring ingrown hairs. The principle is simple: if there are fewer hairs to grow back, there are fewer opportunities for ingrowns to form. Several laser types have been studied specifically for this purpose, and the results are consistently strong.
In one study using a pulsed infrared laser, all patients saw a greater than 50% reduction in hair density, and after three treatment sessions, every patient reported more than 75% improvement in the inflamed bumps that characterize ingrown hairs.7Archives of Dermatology. Treatment of Pseudofolliculitis With a Pulsed Infrared Laser A head-to-head comparison of long-pulse alexandrite laser and intense pulsed light (IPL) found that the alexandrite laser reached about 80% improvement in seven sessions, while IPL took 10 to 12 sessions to reach about 50% improvement. Over a full year of follow-up, the alexandrite side showed minimal recurrence compared to broader recurrence on the IPL-treated side.8PubMed Central. Comparative Evaluation of Long Pulse Alexandrite Laser and Intense Pulsed Light Systems for Pseudofolliculitis Barbae Treatment with One Year of Follow Up
A common concern, especially for people with darker skin, is whether laser treatment is safe. This matters because ingrown hairs disproportionately affect people with darker skin tones, and older laser technology carried a real risk of burns or pigmentation changes in those skin types. Newer diode lasers have been studied specifically in people with Fitzpatrick skin types IV through VI (medium-brown to very dark skin) and found to be safe with minimal side effects. In one recent study, only one patient out of the group experienced a mild superficial blister, which resolved after a minor adjustment in the laser settings. No scarring, lasting pigment changes, or keloid formation was observed.9PubMed. Efficacy and safety of 808 nm diode laser hair reduction in Sudanese women with Fitzpatrick skin types IV-VI
Laser hair removal does require multiple sessions (typically four to eight, spaced several weeks apart) and can be expensive out of pocket. But for people who have spent years battling ingrown hairs with limited success from topical and grooming approaches, it often ends up being the intervention that actually resolves the problem rather than just managing it.
Ingrown Hairs Below the Neck
Most of the research on ingrown hairs focuses on the beard area because that’s where the condition is most studied and most clinically significant. But ingrown hairs are extremely common on the bikini line, legs, underarms, and chest. The underlying mechanism is the same: a cut or tweezed hair grows back into the skin instead of out of it. The difference is practical. The skin in the groin and bikini area is thinner, more prone to friction from clothing, and more sensitive to irritation from chemical exfoliants.
For bikini-area ingrown hairs, loose-fitting underwear made from breathable fabric helps reduce the friction that pushes hairs sideways into the skin. Waxing is a mixed bag here. It pulls the entire hair out from the root, so the regrowing hair has a tapered tip instead of the sharp, flat edge left by a razor. That tapered tip is less likely to pierce the skin. But waxing also traumatizes the follicle, and if the hair grows back at a slightly different angle, you get an ingrown anyway. Some people find that waxing dramatically reduces their ingrown hairs; others find it makes them worse. If you’re going to wax, exfoliating the area regularly between sessions helps newly growing hairs break through the surface.
Laser treatment data backs up its effectiveness in these areas too. The pulsed infrared laser study noted complete hair-growth delays of four to six weeks in the groin and underarm areas, compared with three to four weeks for facial hair.7Archives of Dermatology. Treatment of Pseudofolliculitis With a Pulsed Infrared Laser The response to laser tends to be slightly better below the neck because body hair growth cycles are longer and less dense than facial hair.
Common Myths That Make Things Worse
A few widely repeated pieces of advice actively make ingrown hairs worse. The first is the idea that you should exfoliate aggressively with a rough scrub right before shaving. Physical scrubs with large, jagged particles (sugar scrubs, walnut shell scrubs) can create micro-tears in the skin, which then become entry points for bacteria and add to inflammation. A gentle chemical exfoliant applied the night before is more effective and much less irritating.
Another persistent myth is that applying rubbing alcohol or aftershave with a high alcohol content “disinfects” the area and prevents bumps. Alcohol strips the skin’s moisture barrier, leading to dryness and flaking that actually traps hairs underneath. Witch hazel or an alcohol-free toner is a better post-shave antiseptic if you feel you need one.
Finally, there’s the belief that tighter, closer shaves are always better. Marketing for multi-blade razors reinforces this constantly. But for anyone prone to ingrown hairs, the “closest shave possible” is exactly what you don’t want. The clinical evidence points in the opposite direction: leaving just enough stubble that the hair tip stays above the skin surface is the single most reliable way to stop the cycle.2JAAD Reviews. Insights into the role of grooming modifications and preventative approaches in Pseudofolliculitis barbae: A narrative review of hair removal practices
Ingrown Hairs and Military Grooming Standards
Ingrown hairs aren’t just a cosmetic annoyance. In institutional settings with strict grooming requirements, they can become a serious professional and medical issue. The U.S. military has a long and complicated history with pseudofolliculitis barbae, because daily close shaving is required by grooming standards. Service members with curly hair who develop chronic ingrown hairs have historically been granted “shaving profiles” allowing them to skip shaving or use clippers instead of razors. But these accommodations have sometimes been inconsistent across branches, and in the Navy, permanent shaving waivers were discontinued over concerns about proper gas mask fit.10Military Medicine. Pseudofolliculitis Barbae in the U.S. Military, a Review
This tension between grooming standards and a condition that disproportionately affects Black service members has prompted ongoing review of military policies. It’s also a useful illustration of a broader point: ingrown hairs are not a sign of poor hygiene or laziness. They’re a predictable consequence of specific hair biology interacting with specific hair-removal methods. When those methods are mandated by policy, the problem moves from personal grooming into occupational health, and the solutions often need to go beyond better shaving cream.
When Scars or Dark Spots Have Already Formed
Chronic ingrown hairs often leave behind post-inflammatory hyperpigmentation, the dark marks that persist long after the bump itself has healed. These marks are especially common and visible on darker skin tones. They aren’t permanent, but they can take months to fade on their own.
Ingredients that speed up the fading process include azelaic acid, vitamin C serums, niacinamide, and alpha arbutin. Prescription-strength hydroquinone is another option, though it’s usually reserved for stubborn cases and should be used under a dermatologist’s guidance because of the risk of rebound darkening with prolonged use. Sunscreen on affected areas also helps, even on skin that isn’t typically sunburn-prone, because UV exposure stimulates melanin production and can darken existing marks.
For actual scarring rather than just discoloration, the options are more limited at home. Raised, firm scars (hypertrophic scars or keloids) from repeated ingrown hairs occasionally form, especially in people who are keloid-prone. Silicone scar sheets, intralesional steroid injections, and in some cases laser resurfacing may be needed. If you’re noticing that your ingrown hair bumps are leaving behind raised, hard tissue rather than flat dark marks, a dermatologist visit sooner rather than later gives you more treatment options before the scarring becomes established.