RT Book, Section A1 Kurta, Anastasia O. A1 Glaser, Dee Anna A2 Kang, Sewon A2 Amagai, Masayuki A2 Bruckner, Anna L. A2 Enk, Alexander H. A2 Margolis, David J. A2 McMichael, Amy J. A2 Orringer, Jeffrey S. SR Print(0) ID 1161325581 T1 Hyperhidrosis and Anhidrosis T2 Fitzpatrick's Dermatology, 9e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9780071837798 LK accessmedicine.mhmedical.com/content.aspx?aid=1161325581 RD 2024/04/19 AB AT-A-GLANCEPrimary focal (essential) hyperhidrosis:Idiopathic and symmetric and can affect the palms, soles, axillae, craniofacial region, groin, other areas, or combination of body sites.Treatment is based on severity of symptoms and location and follows a stepwise approach.Secondary hyperhidrosis:Can occur from underlying systemic illnesses, medications, or both (obtaining a detailed medical history is crucial).The pattern of sweating is classically generalized, but sometimes can be focal or regional if caused by neurologic disease or trauma, or a primary dermatologic cause (eg, eccrine nevus).Treatment should target the underlying disease process or eliminate or change medications that the patient takes, but this is often not feasible.Anhidrosis:Anhidrosis may occur because of congenital or acquired causes (secondary or idiopathic anhidrosis).Can become a medical emergency leading to hyperthermia, heat stroke, or death.