👉 Paratrichosis is a rare condition that affects the growth of hair and nails in some people. It can occur at any age, but it's most common in children and teenagers. Paratrichosis causes the hair to grow backwards on the scalp, which can cause itching or discomfort. In severe cases, paratrichosis can lead to bald spots on the head. While not a specific term, "paratrichosis" is often used as a synonym for this condition.
