Lichen planus is a disease in which there is an itchy
Causes, incidence, and risk factors
The exact cause of lichen planus is unknown. However, it is likely to be related to an allergic or immune reaction.
- Exposure to medications, dyes, and other chemical substances (including gold, antibiotics, arsenic, iodides, chloroquine, quinacrine, quinide, phenothiazines, and diuretics)
- Disorders such as
Lichen planus generally affects middle-aged adults. It is less common in children.