Lichen planus is a condition that can cause swelling and irritation in the skin, hair, nails and mucous membranes. Lichen planus occurs when your immune system attacks cells of the skin or mucous membranes. It’s not clear why this abnormal immune response happens. The condition isn’t contagious. It can have complications and a medical practitioner should be consulted
Liquen plano
![Diagram showing lichen planus on woman skin](https://nailknowledge.org/wp-content/uploads/2021/07/Lichen-planus.jpg)