What is the term for excessive sweating in one specific area or throughout the body?

The term for excessive sweating in one specific area or throughout the body is hyperhidrosis. This medical condition can occur in localized regions, such as the hands, feet, or armpits, or it can be generalized, affecting the entire body. Hyperhidrosis can have a variety of causes including genetic factors, underlying medical conditions, or can occur without any obvious reason.

In contrast, hypohidrosis refers to a reduced ability to sweat, which can lead to overheating, while diaphoresis is a term often used to describe sweating that occurs as a response to heat, exercise, or anxiety, rather than as a standalone condition. Perspiration is a general term for the act of sweating, which does not specifically denote excessive sweating. Thus, hyperhidrosis is the most accurate term that fits the description in the question.