Cupping therapy is a form of pseudoscience in which a local suction is created on the skin with the application of heated cups.
Cupping practitioners attempt to use cupping therapy for a wide array of medical conditions including fevers, chronic low back pain, poor appetite, indigestion, high blood pressure, acne, atopic dermatitis, psoriasis, anemia, stroke rehabilitation, nasal congestion, infertility, and menstrual period cramping.
Source: Wikipedia
