A rare condition in which there is little or no hair growth on the head, including the brows above the eyes and the edge of the eyelids, or other areas of the body where hair normally grows. Hair in the affected areas usually stays short and is dry and rough. It may also be tightly curled, lighter in color, and break easily. Hypotrichosis is usually congenital (present at birth) and is linked to several different genetic syndromes.