Pseudofolliculitis barbae (PFB) is a chronic inflammatory skin condition caused by shaved hairs curling back into the skin, triggering an immune response. You probably know it as razor bumps. It affects up to 83% of Black men in the United States and is common among anyone with tightly curled hair, including men of Hispanic and Middle Eastern descent. Despite how it looks, PFB is not an infection. It’s your body reacting to its own hair as if it were a foreign invader.
How Razor Bumps Form
When you shave, the blade cuts hair at a sharp angle, creating a pointed tip. In people with curly or coiled hair, that sharpened strand follows its natural curve as it grows and can pierce back into the surrounding skin. This re-entry happens through one of two routes: the hair either curves outward and punctures the skin surface about 1 to 2 millimeters from the follicle opening, or it retracts below the skin after shaving, pierces through the wall of the hair follicle itself, and enters the deeper layer of skin called the dermis.
Either way, your immune system treats the embedded hair like a splinter. It launches an inflammatory response, sending white blood cells to the site and forming the red, tender bumps that characterize PFB. Because shaving is repetitive, this cycle of cut, curl, penetrate, and inflame happens over and over, making the condition chronic for people who continue to shave closely.
Who Gets It and Why
Hair shape is the single biggest factor. Tightly curved hair is far more likely to re-enter the skin after being cut. That’s why PFB disproportionately affects Black men: studies of U.S. military personnel found that 45 to 83% of Black service members experienced PFB symptoms, compared with 18% of white service members. The condition also occurs in women who shave areas where curly hair grows, particularly the bikini line and underarms.
Genetics play a role beyond hair texture. A specific variation in the KRT75 gene, which helps build a structural protein in the hair follicle, has been linked to a sixfold greater risk of developing PFB. This gene variant is more common in people of African descent. So while shaving technique matters, some people are biologically predisposed to the condition regardless of how carefully they shave.
What It Looks and Feels Like
PFB shows up as small, firm bumps clustered in areas where you shave repeatedly, most often the neck, jawline, and cheeks. The bumps can be skin-colored, red, or darker than the surrounding skin. Some contain visible loops of hair curling back into the surface. They’re often itchy or tender, and scratching or picking at them makes things worse.
In more severe cases, the bumps can fill with pus, which is part of the inflammatory response, not necessarily a sign of bacterial infection. Over time, repeated inflammation in the same spots can lead to darkened patches of skin (post-inflammatory hyperpigmentation) or permanent scarring, including raised keloid scars. These complications are more common in people with darker skin tones and can persist long after the bumps themselves resolve.
How It Differs From Folliculitis
PFB is often mistaken for bacterial folliculitis, an actual infection of the hair follicle. The distinction matters because the treatments are different. PFB is a foreign-body reaction to your own hair. There’s no bacterial cause. A dermatologist can usually tell the difference by looking at the pattern: PFB appears specifically in shaved areas, the bumps follow the distribution of hair growth, and embedded hairs are often visible on close examination. Bacterial folliculitis, by contrast, can appear anywhere on the body and typically responds to antibiotics, while PFB does not.
Prevention Through Shaving Technique
The most effective prevention is simply not shaving, or at least not shaving closely. But for people who need or want a clean-shaven look, technique changes can significantly reduce flare-ups.
- Shave with the grain. Figure out which direction your hair grows and follow it. Shaving against the grain gives a closer cut but creates sharper hair tips more likely to re-enter the skin.
- Soften hair first. Shave at the end of a shower, or hold a warm, damp washcloth against the area beforehand. Softened hair swells slightly, making it less likely to curve back into the skin.
- Prep and protect. Wash with a non-comedogenic cleanser before shaving and always use a moisturizing shaving cream. After shaving, rinse with warm water, apply a cool damp cloth, then use a soothing aftershave formulated for sensitive skin.
- Replace blades regularly. Swap out disposable razors after five to seven shaves. Dull blades tug at hair rather than cutting cleanly, which increases irritation. Store razors in a dry place between uses.
- Shave frequently enough. Counterintuitively, shaving every two to three days can help. Shorter hair has less length to curl and penetrate the skin.
If your hair grows in multiple directions on different parts of your face, you can train it to grow more uniformly by brushing it gently with a soft toothbrush each day. This simple habit reduces the number of hairs that grow at angles prone to re-entry.
Treatment Options
For mild PFB, over-the-counter options can help. A low-strength hydrocortisone cream reduces inflammation, while benzoyl peroxide helps keep follicles clear. Tretinoin (a retinoid cream) can also be effective for mild to moderate cases by promoting skin cell turnover and helping trapped hairs release, though it can irritate sensitive skin, especially during the first few weeks.
A prescription cream that slows hair growth can extend the time between shaves, giving your skin longer to heal between cycles of irritation. For people with significant inflammation, a doctor may prescribe an oral anti-inflammatory. Because PFB is driven by inflammation rather than infection, there’s no set course length for these medications. Treatment continues as long as the condition persists.
Laser Hair Removal as a Long-Term Solution
For people with chronic, severe PFB, laser hair removal targets the root cause by permanently reducing the number of hairs that grow in the treated area. In clinical studies, laser treatment reduced the number of PFB bumps by an average of 69%, with individual results ranging from 48% to 80% reduction. Multiple sessions are typically needed, spaced several weeks apart.
Laser treatment requires careful selection of the right device for your skin tone. Darker skin absorbs more laser energy, which increases the risk of burns or pigment changes if the wrong wavelength is used. Longer-wavelength lasers have been tested specifically on people with the darkest skin tones (Fitzpatrick types V and VI) and shown to be both safe and effective. If you’re considering laser treatment, look for a provider experienced in treating darker skin, as technique and device selection are critical to getting good results without complications.
Scarring and Skin Discoloration
The longer PFB goes untreated, the greater the risk of lasting skin changes. Post-inflammatory hyperpigmentation, where healed bumps leave behind dark spots, is extremely common, particularly in darker skin. These spots can take months to fade on their own, and some never fully resolve without treatment. Topical retinoids and products containing ingredients that inhibit excess pigment production can speed the process.
Scarring is the more serious concern. Repeated inflammation in the same follicles can produce raised, thickened scars. In people prone to keloids, these scars can grow larger than the original bump and become a cosmetic issue of their own, sometimes requiring separate treatment. Early, consistent management of PFB is the best way to prevent these complications from developing in the first place.