Final answer:
Lichen planus is an inflammatory skin condition characterized by polygonal purple papules or plaques on the skin or mucous membranes. It is believed to result from an autoimmune reaction and can affect various parts of the body. Treatment aims to relieve symptoms and may include topical corticosteroids, oral medications, or light therapy.
Step-by-step explanation:
Lichen planus is an inflammatory skin condition characterized by polygonal purple papules or plaques on the skin or mucous membranes. It is a chronic condition that can affect various parts of the body, including the skin, mouth, genitalia, and nails. The purple color is due to the deposition of dense, dark purple granules in the nucleus of the cells.
Lichen planus is believed to result from an autoimmune reaction, where the body's immune system mistakenly attacks the skin or mucous membranes. The exact cause is unknown, but it may involve a combination of genetic factors, environmental triggers, and an overactive immune response.
The condition is typically diagnosed based on the appearance of the lesions and may require a skin biopsy for confirmation. Treatment focuses on relieving symptoms and may include topical corticosteroids, oral medications, or light therapy.