Krao Farini, 1883 A number of mechanisms can lead to<unk> . One cause involves areas of the skin that are transforming from the small vellus type to the larger terminal type. This change normally occurs during adolescence, when vellus hair follicles in the underarms and groin grow into terminal hair follicles.<unk>  involves this same type of switching, but in areas that do not normally produce terminal hair. The mechanisms for this switch are poorly understood. Another mechanism involves a change in the hair cycle. There are three stages of the hair cycle: the anagen phase (hair growth), the catagen phase (hair follicle death), and the telogen phase (hair shedding). If the anagen phase increases beyond what is normal, that region of the body will experience excessive hair growth.
Hypertrichosis
Auricular hypertrichosis
Hyperpigmentation
Hypopigmentation
Green nails
Generalized lentiginosis
Amastia
Granulomatous slack skin