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Alopecia Areata. Alopecia areata is an autoimmune condition that affects about 2 percent of the population. It occurs when your immune system attacks your hair follicles. This can damage your ...
Alopecia occurs for various reasons, including genetics, autoimmune disorders where the immune system attacks hair follicles, hormonal changes, medical treatments like chemotherapy, or other factors.
Folliculitis starts with the introduction of a skin pathogen to a hair follicle. Hair follicles can also be damaged by friction from clothing, an insect bite, [2] blockage of the follicle, shaving, or braids that are very tight and close to the scalp. The damaged follicles are then infected by Staphylococcus spp. Folliculitis can affect people ...
It can occur anywhere on the body where there are hair follicles (so everywhere except the lips, eyelids, palms, and soles of the feet). Folliculitis is also sometimes called the following: Barber ...
Hair diseases are illnesses that impact the persistence and regular growth of hair. Types of hair diseases include folliculitis , hirsutism , hypertrichosis , hypotrichosis ( alopecia ), Menkes kinky hair syndrome , monilethrix , and piedra .
Hair loss may be spread throughout the scalp (diffuse) or at certain spots (focal). The loss may be sudden or gradual with accompanying stress. The most common cause is androgenetic alopecia, also known as male pattern or female pattern hair loss due to the effects of dihydrotestosterone (DHT) on the hair follicles.
In alopecia areata, a hair follicle is attacked by the immune system. T-cells swarm the roots, killing the follicle. This causes the hair to fall out and parts of the head to become bald. Alopecia areata is thought to be a systemic autoimmune disorder in which the body attacks its own anagen hair follicles and suppresses or stops hair growth. [22]
Alopecia universalis can occur at any age, and is currently believed to be an autoimmune disorder, in which a person's immune system attacks the hair follicles. Genetic factors may contribute to AU, as about 20% of those affected have a family member with alopecia. [3]