Cupping is a form of massage therapy which decompresses soft tissues using vacuum suction, unlike other forms of massage that compresses soft tissues.  During cupping, the cup gently sucks to your skin and lifts underlying soft tissue into the cup. It is used to treat lack of mobility, tight muscles, scars and many diagnoses like headaches, tendinitis, bursitis, plantar fasciitis, fibromyalgia, and release of trigger points. Mild soreness is to be expected from the buildup of lactic acid in the muscle tissue, but less soreness than a deep tissue massage.