FDH is a rare disorder that primarily affects females and has extreme variability. It is characterized by skin lesions that look streaked, underdeveloped or “punched-out”, birth defects of the hands and feet and birth defects of the eyes. There may be inflammation, itching, reddening, blistering, and crusting of the skin. Skin may be absent, discolored or lack color (pigmentation) in some areas. The nails may be absent or appear abnormal. Enlargement of capillaries/veins under the skin (telangectasias) often develop with ate. Wart-like growth (papillomas) are usually not present at birth but develop with age and are typically found on the gums, tongue, lips, nose, genetalia, and anus. Overgrowth of tissue may be found on the palms of the hands and soles of the feet. Excessive sweating (hyperhidrosis) or absence of sweating (hypohydrosis) is often present on the palms of the hands and soles of the feet. Nearly all individuals with focal dermal hypoplasia display at least a few of the skin abnormalities. The hair may be sparse, brittle, and/or missing.