What should you know about razor bumps behind head?

A close cut can leave a curved or coarse hair turning back into the skin. Sweat, shirt collars, helmets and repeated clipping can add friction at the hairline. Small itchy or tender red bumps fit ingrown hairs; pus, spreading redness or crusting can point to folliculitis. Dark marks may remain after inflammation settles, especially in deeper skin tones. A clinician can distinguish these from acne, cysts or other scalp conditions.

Pause close shaving until the skin calms. Wash gently, pat dry and avoid scratching, picking or digging for trapped hairs. Use a clean trimmer with a guard and shave in the direction of growth when you resume; do not stretch the skin. Reduce collar and helmet friction where possible. A pharmacist or clinician can advise whether a suitable anti-inflammatory or acne-type product is appropriate for the scalp and your skin tone. Recurrent cases may benefit from discussing [Razor Bumps](/conditions/pseudofolliculitis-barbae/) or [Laser Hair Removal](/treatments/laser-and-energy/laser-hair-removal/).

Arrange medical care if pain, warmth, swelling, pus or redness is increasing, if you develop fever, or if bumps leave scars or hair loss. Seek prompt assessment for a rapidly spreading tender area or severe headache with scalp swelling. Persistent bumps deserve review because [Folliculitis](/conditions/folliculitis/) and [Ingrown Hairs](/symptoms/ingrown-hairs/) may need different treatment.

Ask whether the pattern is ingrown hair, folliculitis or another scalp problem; which shaving method suits your hair texture; and how to prevent dark marks or scarring.