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Hyperhidrosis, also known as "Lewis syndrome", is a condition characterized by abnormally increased sweating, in excess of that required for regulation of body temperature. It can be associated with a significant quality of life burden from a psychological, emotional, and social perspective. It has been called by some 'the silent handicap'. Both the words diaphoresis and hidrosis can mean either perspiration (in which sense they are synonymous with ''sweating'') or ''excessive'' perspiration, in which case they refer to a specific, narrowly defined, clinical disorder. ==Classification== Hyperhidrosis can either be ''generalized'', or ''localized'' to specific parts of the body. Hands, feet, armpits, and the groin area are among the most active regions of perspiration due to the high number of sweat glands in these areas. When excessive sweating is localized (e.g. palms, soles, face, underarms, scalp) it is referred to as ''primary'' hyperhydrosis or focal hyperhidrosis. Excessive sweating involving the whole body is termed ''generalized'' hyperhidrosis or secondary hyperhidrosis. It is usually the result of some other, underlying condition. Primary or ''focal'' hyperhidrosis may be further divided by the area affected, for instance palmoplantar hyperhydrosis (symptomatic sweating of only the hands or feet) or gustatory hyperhidrosis (sweating of the face or chest a few moments after eating certain foods).〔 Hyperhidrosis can also be classified by onset, either congenital (present at birth) or acquired (beginning later in life). Primary or focal hyperhidrosis usually starts during adolescence or even earlier and seems to be inherited as an autosomal dominant genetic trait. It must be distinguished from ''secondary'' hyperhidrosis, which can start at any point in life. Secondary hyperhydrosis may be due to a disorder of the thyroid or pituitary glands, diabetes mellitus, tumors, gout, menopause, certain drugs, or mercury poisoning. One classification scheme uses the amount of skin affected. In this scheme, excessive sweating in an area of 100 square centimeters (16 square inches) or more is differentiated from sweating that affects only a small area. Another classification scheme is based on possible causes of hyperhydrosis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hyperhidrosis」の詳細全文を読む スポンサード リンク
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