L68: Hypertrichosis

Hypertrichosis is a group of conditions characterized by excessive hair growth in areas where hair does not normally grow. The hair can be light and fine or thick and coarse, and the growth can affect the entire body or be localized to one area. This condition can be present at birth, known as congenital hypertrichosis, or it can develop later in life, called acquired hypertrichosis. The exact cause varies depending on the type but can include genetic mutations, underlying health conditions, or certain medications. Common symptoms include increased hair growth that is denser than usual and does not match the patient's age, gender, or race. This condition is not usually associated with other health problems, but it can be part of a syndrome when combined with other signs and symptoms. Hypertrichosis itself does not affect a person's physical health, but it may cause psychological distress due to its appearance.