Hypohidrotic ectodermal dysplasia
(HED) is a genetic skin disease. Common symptoms include sparse scalp and body hair, reduced ability to sweat, and missing teeth. HED is caused by mutations in the EDA, EDAR, or EDARADD genes. It may be inherited in an X-linked recessive, autosomal recessive, or autosomal dominant manner depending on the genetic cause of the condition. The X-linked form is the most common form. The forms have similar signs and symptoms, however the the autosomal dominant form tends to be the mildest. Treatment of hypohidrotic ectodermal dysplasia may include special hair care formulas or wigs, measures to prevent overheating, removal of ear and nose concretions, and dental evaluations and treatment (e.g., restorations, dental implants, or dentures). Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.