[Anhidrosis] means lack of sweating. It is also known by a number of other names including Adiaphoresis, Ischidrosis, Hypohidrosis, Oligidria, Oligohidrosis and Sweating deficiency.
It may be caused by underactivity of the sympathetic nervous system. Eccrine sweat glands are innervated via muscarinic acetylcholine receptors. Hence antimuscarinic drugs cause anhidrosis.
Emotional stress and anhidrosis
Mental disorders and anhidrosis