Seborrheic hair loss is a form of premature hair loss that generally afflicts men in their youth (onset between 20 and 30 years of age), mainly affecting the frontal region and the crown. The cause, as the name of the condition suggests, is related to an excess production of sebum that provokes or accelerates hair loss.

Androgenetic alopecia is the most common type of hair loss and affects the majority of white men, with varying degrees of seriousness. It is less frequent in other ethnic groups. Often it can be associated with a family history of baldness, but the absence of other affected family members does not exclude the diagnosis. The condition is characterized by progressive hair loss in the crown area, the front hairline and the temporal area.