Cupping therapy, also known as hijamah or wet cupping, is a treatment method described in the document that involves using suction cups on the skin to help treat various diseases. It is discussed as a Sunnah practice with references to hadiths supporting its use. The document provides details on the 3-step technique of suction, scarification, and suction used in hijamah and lists various skin diseases it can help treat such as eczema and psoriasis.