Lichen ruber moniliformis, also known as lichen planus, is a dermatological condition that causes itchy, flat-topped bumps and patches on the skin. Synonyms for this condition include LP, lichen planus, lichen ruber, and lichenoid eruption. LP is a chronic inflammatory autoimmune disease that can affect various parts of the body, such as the skin, nails, mouth, and genitals. It often manifests as purple or reddish skin lesions that may be accompanied by pain or discomfort. While the exact cause of LP remains unknown, it is believed to be related to certain medications, viral infections, or genetic predispositions. Treatment options for lichen ruber moniliformis aim to relieve symptoms and reduce inflammation through topical or systemic medications.