In children, it is common to have bald patches on the head because of cradle cap, traction alopecia, or alopecia areta. Traction alopecia is a condition of losing hair because of rubbing the head against a crib or mattress. Alopecia areta is an autoimmune condition that causes hair loss; the exact cause is unknown.
Neonatal Occipital Alopecia - An Overview
Alopecia is the partial or complete loss of hair (baldness) that affects the scalp or the entire body. This can be permanent or temporary.
