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Alopecia areata (AA), also known as spot baldness, is a condition in which hair is lost from some or all areas of the body. [12] [1] It often results in a few bald spots on the scalp, each about the size of a coin. [7]
Another type of stress-related hair loss is a hair-pulling disorder known as trichotillomania. It can also be triggered by anxiety and stress, causing some individuals to pull their hair out.
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.
Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. [2] Typically at least the head is involved. [4] The severity of hair loss can vary from a small area to the entire body. [7] Inflammation or scarring is not usually present. [4] Hair loss in some people causes psychological distress. [3]
Unlike other types of hair loss — like male pattern baldness that just occurs naturally with age — there’s usually an inciting event or factor that causes telogen effluvium hair loss.
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Cowlick vs. Balding: Key Differences. A cowlick differs from a bald spot in a couple key ways.. First, a cowlick is a natural, normal feature of your scalp that occurs as a result of your genes.
They found the gene P2RY5 causes a rare, inherited form of hair loss called hypotrichosis simplex. It is the first receptor in humans known to play a role in hair growth. [ 103 ] [ 104 ] [ 105 ] Researchers found that disruption of the gene SOX21 in mice caused cyclical hair loss.