There are two types of trichotillomania. Type A is most common which involves pulling from the scalp. Type B involves the pulling of eyelashes and eyebrows.
It is not certain what causes it, but it is thought that it is caused by mental trauma, there is no known cure.
Trich is also thought to be related to other things such as obsessive compulsive disorder, depression and obsessive skin-picking.
Most trich sufferers feel ashamed and suffer from low self-esteme, finding it hard to let people in and talk to others, but if you think you suffer from trich, consult your doctor and take a look on google, there are thousands other out there! :)
Some of the most common places people pull are the scalp, eyebrows, and eyelashes. However, Trichsters can pull from anywhere with hair.