What skin condition involves excessive sweat production?

Hyperhidrosis is the condition that is characterized by excessive sweating. This condition can occur in various parts of the body and is often not proportional to the heat or exercise being undertaken at the time. It typically stems from overactive sweat glands, which can be triggered by various factors including genetics, anxiety, or certain medical conditions. The condition can significantly impact an individual's quality of life, leading to discomfort and social anxiety.

In contrast, the other options represent distinct skin disorders not related to sweat production. Acanthosis nigricans is characterized by dark, velvety patches of skin, usually associated with insulin resistance. Alopecia refers to hair loss, which can be caused by various factors including autoimmune conditions. Acne is a common skin condition resulting from clogged hair follicles, typically involving oil, dead skin cells, and bacteria, rather than excessive sweating. Each of these conditions has its own specific causes and implications, making hyperhidrosis the only one directly linked to increased sweat production.