Alopecia is characterised by the presence of hair loss in specific patches. It can extend as far as total loss of body hair and has a number of causes.

hair loss occurring in patches.

Alopecia areata is thought to be an auto immune condition where hair follicles are mistakenly attacked by a person's white blood cells causing hair loss.

Temporary loss of hair, generally represented in small, coin shaped bald patches.

A patchy baldness which typically begins with patchy hair loss on the scalp and sometimes progresses to complete baldness and even loss of body hair. The hair loss tends to be rather rapid and asymmetrical and is different than male pattern baldness. See the entire definition of Alopecia areata

An autoimmune form of hair loss not related to male pattern loss. Sometimes people confuse this for male pattern loss, but alopecia areata occurs in patches anywhere on the head and sometimes results in total loss of hair on the head and body.

sudden loss of hair in smooth, circular patches of the scalp, eyebrows, or beard. This disease causes the body to form antibodies against hair follicles. It can result from factors such as stress, genetics, or the immune system.

A patchy baldness usually of temporary nature. Cause unknown but anxiety and stress are common precipitating factors.

A disorder in which the immune system attacks the hair follicles, causing loss of hair on the scalp, face, and other parts of the body.

Alopecia Areata is an autoimmune disease that frequently causes hair loss. Although only less than two percent of the world’s population is affected, Alopecia Areata frequently is noticed first when round patches of hair begin to fall out suddenly. This is due to the immune system attacking the hair growth tissues.

an autoimmune, often reversible disease in which loss of hair occurs in sharply defined areas usually involving the scalp or beard, but at times every hair on the body.

A disease that causes the body to form antibodies against some hair follicles. It can result from such factors as stress, genetics and the immune system. Alopecia Areata causes sudden smooth, circular patches of hair loss.

A disease of unknown cause in which hair suddenly falls out, leaving bald patches on the scalp. In half the people affected, the hair grows back within a year.

An autoimmune disease that causes the body to form antibodies against some hair follicles. Alopecia Areata causes sudden smooth, circular patches of hair loss. There are no known cures and in many cases the hair grows back on is own.

A disease in which well-defined bald patches occur; it usually clears completely within 6 to 12 months without treatment

A disease of the body that is a common cause of hair loss that affects approximately two million Americans.

Alopecia Areata is the medical term for hairloss which occurs in patches on the scalp.

Alopecia areata is a form of hair loss from areas of the body, usually from the scalp. Because it causes bald spots on the head especially in the first stages, it is sometimes called spot baldness. In 1–2% of cases, the condition can spread to the entire scalp (Alopecia totalis) or to the entire epidermis (Alopecia universalis).

Alopecia Areata (AA) is a type of non-scarring hair loss (alopecia) that can have an unpredictable course and can be refractory at times to treatment intervention. Although the exact cause is unknown, the thought is that AA is a condition in which T lymphocytes attack one’s own hair follicles. The clinical presentation of AA (details to follow) involve anywhere from patchy oval/circular losses of hair to complete absence of scalp and even body hair. In most cases of patchy Alopecia Areata, resolution is complete within one year without treatment. In general, treatment is not curative but palliative only.