What is the medical term for the lack of sweating?

Anhidrosis is the medical term used to describe the condition in which an individual experiences a lack or absence of sweating. This can occur due to various reasons, including certain medical conditions, skin disorders, or as a side effect of medications. Proper sweating is crucial for the body's temperature regulation and cooling mechanism; therefore, anhidrosis can lead to overheating and other heat-related complications.

The other terms present in the choices refer to different conditions: hyperhidrosis is characterized by excess sweating, ekphoria generally relates to a psychological state or experience, and hydrosis typically refers to the process of sweating. Understanding these distinctions helps clarify why anhidrosis is the correct term for the absence of sweat.