Skin sores appear on the legs ... One distinguishable characteristic is the colour of the rashes. Lichen planus is classically purple in colour and is accompanied with intense itching.

inflammatory disease of the skin, hair follicles, and mucous membranes. The cause of lichen planus is unknown; however, some lichenoid rashes are associated with allergic reactions to medications.

It is often called the itch that rashes ... Just because dry skin itches does not automatically make the diagnosis of atopic dermatitis—psoriasis and lichen planus can both be itchy and appear ...