Cupping, generally, does not hurt but because of the strength of the suction generated by the cups, it can be a unique and intense sensation, especially if it’s your first time. The marks that are left behind are basically like bruises and generally do not hurt but may feel tender to touch. The suction generated by the cups draws blood to the surface of the skin along with all kinds of unwanted toxins, such as static blood, lymph, and pathogenic factors.