Lichen planus is a rash that can affect different parts of your body, including inside your mouth.
Symptoms of lichen planus include raised purple-red blotches on your skin, white patches in your mouth and bald patches on your scalp.
Lichen planus is usually treated with creams and ointments. Medicines or a special light treatment may be needed if it's severe.
Page last reviewed: 07/08/2017
Next review due: 07/08/2020