Lichen planus can be triggered by:

- Hepatitis C infection and other types of liver disease
- Hepatitis B vaccine
- Certain types of flu vaccines
- Allergy-causing agents (allergens), such as foods, dental materials or other substances
- Nonsteroidal anti-inflammatory drugs, such as ibuprofen (Motrin, Advil, others) and naproxen (Aleve, others)

- Certain medications for heart disease, high blood pressure or arthritis

WHAT FACTORS TRIGGER LICHEN PLANUS?