Types of Hyperhidrosis

The most common causes are hot environments, extreme exertion, and fevers. The sympathetic autonomic nervous system controls the amount of sweating. Increased sweating is the result of increased activity of the sympathetic nerves as in the case of stress and  in medical condition such as thyrotoxicosis and phaeochromocytoma. In the case of shock, sweat is released because the blood supply to the sweat glands is substantially reduced by its redirection to more vital organs. The skin tends to be cold, pale and clammy.

Localized hyperhidrosis may occur where the sweat glands are more numerous, as on the forehead, palms and soles, and in the armpits (axillae).

Gustatory hyperhidrosis is excessive perspiration and flushing, especially on the forehead, that results from eating highly spiced foods. This reaction may be triggered merely by the smell or thought of such food.

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