tricho-, trich-, -tricha, -trichia, -trichan, -trichic, -trichosis, -trichous, -thrix, -trichum, -trichy +
(Greek: hair [thread; filament; condition of the hair])
These worms are of economic importance because of the damage they cause to domestic animals and birds.
The sulfur content of the hair is greatly reduced and mental retardation has frequently been a related feature.2. Congenital fragile hair with multiple fractures resulting from low sulfur-containing amino acid, cysteine, content of the hair, mental impairment, and short stature.
2. Pleasure, gratification, or relief when pulling out one's hair.
3. The unnatural and irresistible urge to pullout one's own hair.
It is estimated that eight million Americans are affected by this compulsive action.
Sites of hair pulling may include any region of the body in which hair may grow with the most common areas being the scalp, eyebrows, and eyelashes. Stressful circumstances frequently cause some increased hair-pulling behavior, but increased hair pulling also occurs in states of relaxation and distraction; such as, when watching television or reading a book.
Trichotillomania (TTM) or "trich" is an impulse control disorder characterized by the repeated urge to pull out scalp hair, eyelashes, beard hair, nose hair, pubic hair, eyebrows or other body hair. It may be distantly related to obsessive-compulsive disorder, with which it shares both similarities and differences.