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50% of males, 25% of females (pattern hair loss by age 50) [ 4][ 6] 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 ...
Head lice infestation, also known as pediculosis capitis, is the infection of the head hair and scalp by the head louse ( Pediculus humanus capitis ). [ 6] Itching from lice bites is common. [ 5] During a person's first infection, the itch may not develop for up to six weeks. [ 5]
Alopecia areata, 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] Psychological stress and illness are possible factors in bringing on alopecia areata in individuals at risk, but in most cases ...
Medical genetics. 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. [ 1]
Musculoskeletal problems; Scoliosis; Social anxiety; Seizures; Cleft palate; Feeding problems; Children with this syndrome are often found to have long eyelashes, bushy eyebrows and synophrys (joined eyebrows). Body hair can be excessive and affected individuals are often shorter than their immediate family members. They present a ...
Pattern hair loss (also known as androgenetic alopecia ( AGA) [ 1]) is a hair loss condition that primarily affects the top and front of the scalp. [ 2][ 3] In male-pattern hair loss ( MPHL ), the hair loss typically presents itself as either a receding front hairline, loss of hair on the crown and vertex of the scalp, or a combination of both.
The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child. There are over 6,000 known genetic disorders in humans.
Premature greying of hair (PGH), also known as canities, is the process of greying of hair occurring at an unusually early age. It can have negative effects on self-confidence, self-esteem, and social acceptance of the affected individual. Hair is said to have greyed prematurely if it occurs before the age of 20 years in Europeans, before 25 ...