What skin condition involves an excessive amount of sweating?

Hyperhidrosis is the skin condition characterized by excessive sweating. This condition can occur in various areas of the body, including the palms, feet, underarms, and face, without the influence of heat or physical activity. People with hyperhidrosis often experience significant discomfort and can struggle with social situations due to their condition.

In contrast, anhidrosis refers to an inability to sweat, dermatitis is a general term for inflammation of the skin with various causes, and psoriasis is a chronic autoimmune condition that causes rapid skin cell turnover leading to thick, scaly patches on the skin. Each of these conditions has distinct characteristics and does not involve excessive sweating, making hyperhidrosis the only correct answer to the question.