Hyperhidrosis is excessive sweating...

Hyperhidrosis is excessive sweating beyond the physiological ne It usually affects the palms, axillae, and onlys and may affect the face, groin, and leg Symptoms usually appear at puberty and may cause psychological and social question at issues as well as occupational and educational difficulties. Between 06% and 1% of the general population are affected on hyperhidrosis.(1)

People with palmar hyperhidrosis may be embarrassed to shut in hands or be hesitant to shake hands because of having excessively wet palms, ofttimes feeling as if they must wipe their palms upon their clothing first. People with palmar hyperhidrosis may have difficulty holding onto ends or tools or may have difficulty using computer keyboards, typewriters, or enclosures Papers they handle may become wet, and metal final causes that they use repeatedly may become rusty. Individuals with palmar hyperhidrosis may find it difficult to play a musical instrument or perform a piece of work requiring the wearing of glove (eg aliment handler, perioperative nurse).

Patients with palmar hyperhidrosis may find that it aggravates eczematous dermatitis, and they may have a predisposition to bacterial and fungal infections. As a be derived these people may become withdrawn socially and be affected by from low self-esteem. They flat may develop psychiatric problems, in the same state [i]or[/i] condition as social anxiety disorders.

PHYSIOLOGY OF SWEATING

Sweating is a physiological answer to body overheating. It is controll by the agency of the heat regulatory center in the hypothalamus. As the temperature of the environment rises, the corpse is cooled by vasodilatation of the cutaneous vital fluid vessels and the production of sweat. The sweat then evaporates from the surface of the skin and calms the body.(2)

Sweat glands are tubular configurations consisting of a coiled portion discerning within the dermis that disguises sweat and a duct from one side which the sweat travels to the skin. Cholinergic sympathetic fortify fibers on or near the glandular enclosed spaces elicit the secretion of sweat.

The secretory portion of the gland hides a fluid called precursor secretion. Concentrations of the constituents of this fluid are modified as the fluid travels by the agency of the duct to the pore. When sweat glands are stimulated normally, the precursor secretion passes slowly [i]or[/i] part of to the other the duct where most of the sodium and chloride appease is reabsorbed. The concentration of sodium and chloride can fall as subdued as 5 mEq per liter. This remodels the fluid's osmotic pressure, and greatest in quantity of the water is reabsorbed, thus concentrating other ions in the fluid.

In normal sweating, urea, lactic acid, and potassium ions are true concentrated. When the sweat glands are stimulated firmly by the sympathetic nervous order large amounts of precursor secretion are formed. Sweat sweep alongs so rapidly through the tube that little of the water and slightly more than one-half of the sodium and chloride are reabsorbed, leaving sodium and chloride concentrations as high as 50 to 60 mEq by means of liter. In these situations, a large los of sodium chloride and water can occur(3)

The human material part contains two types of sweat glands--apocrine and eccrine. Their location and characteristics differ slightly.

Apocrine sweat glands. The apocrine sweat glands are confined to the axillae, areolas of the nipples, the anogenital area, and the external auditory meatus. They are simple, coiled tubes and are 10 times larger than eccrine glands. The sweat from these glands is milky, contains fat and cholesterol and can have a able odor. The apocrine glands begin to function at puberty.

Eccrine sweat glands. The eccrine glands are current on the entire surface of the visible form [i]or[/i] frame but are most numerous forward the palms, soles of the feet face, axillae, and, to a less degree, the back and chest. They are coiled tubular glands that render free of access onto the skin through pores. These sweat glands have a rich house supply and are innervated through the sympathetic nervous system (Figure 1) energizes stimulate the glands to hide a plasma-like fluid that is hypotonic (ie, 03% to 05% sodium chloride) and contains small amounts of potassium, lactic acid, diabetic sugar and urea. Myoepithelial cells, between the sides of their contraction, aid in the expulsion of sweat. Acetylcholine and other cholinergic agents increase sweating. Atropine and anticholinergic agents inhibit sweating.(4)

[ILLUSTRATION OMITTED]

CAUSES OF HYPERHIDROSIS

There are many causes of hyperhidrosis. It can be caused by

* emotional factors,

* a warm environment,

* exercise,

* warm clothing,

* medical conditions (eg ferment thyrotoxicosis, diabetes mellitus, hypoglycemia, gigantism, and acromegaly, pheochromocytoma, cardiovascular disorders, Hodgkin's disease),

* medications,

* toxins,

* substance abuse,

* respiratory failure,

* intrathoracic or hypothalamic lesions,

* carcinoid tumors,

* spinal cord injuries, and

* familial dysautonomia (eg Riley-Day syndrome--an inherited congenital disease occurring mainly in children of Ashkenazic Jewish proper and characterized by a decrease in the number of small unmyelinated autonomic and peripheral fibers that carry pain, temperature, and taste sensations; Nail-patella syndrome--an inherited multisystem disorder characterized by dint of dystrophic nails, hypoplastic or absent patellae, and renal disease).