Ingrown hair cysts form when hair becomes trapped in the skin due to clogged pores, often resulting from dirt or oil accumulation. These cysts appear as small, red, or pink bumps that can become painful if infected. Common types include razor bumps, pilonidal cysts, epidermoid cysts, and others, each with distinct locations and characteristics. Most ingrown hair cysts resolve on their own, but medical attention is necessary if symptoms such as increased redness, pus, or fever occur. Preventive measures include avoiding shaving or using alternative hair removal methods, while treatments focus on reducing inflammation and preventing infection.

Ingrown hair cysts develop when hair becomes trapped under the skin, often due to clogged pores filled with dirt or oil, leading to swelling and irritation.

Several types of ingrown hair cysts exist, including razor bumps caused by shaving irritation, pilonidal cysts from skin pressure, and epidermoid cysts linked to keratin buildup.

Razor bumps, also known as pseudofolliculitis barbae, are common ingrown hair cysts appearing as red, raised bumps, frequently occurring in areas like the legs, underarms, and face.

Treatment for ingrown hair cysts involves keeping the area clean and dry, using warm compresses, and avoiding shaving until the cyst resolves; medical intervention may be needed for infected cysts.

Preventive strategies to reduce the risk of ingrown hair cysts include using sharp razors, gentle shaving creams, and considering alternative hair removal methods like laser hair removal.

Infected ingrown hair cysts can lead to complications such as pain, itching, and swelling; signs of infection include pus, increased redness, and fever, necessitating medical attention.

In addition to common cyst types, there are genetic conditions like steatocystoma and eruptive vellus hair cysts, which may cause cyst formation, though not exclusively related to ingrown hairs.