Fox mange, a disease in which the hair falls out; absence of the hair from skin areas where it normally is present; especially, of the head.

Alopecia is one characteristic of mange. It affects both men and women of all ages.

Mange is defined as a contagious scabies-like dermatitis occurring in various animals, including cattle, sheep, horses, dogs, cats, foxes, rabbits, rats, and gallinaceous birds (domestic fowls); caused by any of several of the mange mites.

Loss of hair in sharply defined patches usually involving the scalp or beard.

A patch baldness that typically begins with rapid hair loss on certain areas of the scalp and sometimes it progresses to complete baldness and even loss of body hair.

Alopecia areata affects both males and females and, most often, children and young adults. It seems to be caused by the body's own immune system which attacks the hair follicles and disrupts normal hair formation.

The hair can sometimes regrow within a year without treatment; however, the longer the period of hair loss, the less chance that it will regrow.

Translation: "Complete absence of hair from the scalp or the loss of all scalp hair; with normal hair elsewhere on the body remaining."

Baldness due to absence of hair bulbs at birth.

Baldness due to inflammation of th hair follicles of the scalp.

Loss of hair along the hairline, both front and back, of the scalp.

Loss of hair due to the administration of certain medicines; especially, those containing cytotoxic agents.

Loss of both scalp and body hair accompanied by desquamation of branlike scales.

Premature baldness.

Loss of hair after prolonged fevers or during the course of a disease and may result from systemic or psychogenic factors.

Loss of hair thought to be due to toxins of infectious disease.

Loss of hair from the entire body.

Typical hair loss pattern of males in which the alopecia begins in the frontal area and proceeds until only a horseshoe area of hair remains in the back and temples.

This loss is dependent on the presence of the androgenic hormone testosterone.

Hair loss caused by injury to the scalp.

Common causes include the use of caustic hair straighteners; especially, those that include lye as an ingredient; stress traction injury from tight rollers and braiding; over heating of the hair shafts; and the compulsive pulling out of hair (trichotillomania).