What does it mean when cupping leaves a purple ring with a white center?

After cupping, a purple ring with a white center is the result of combined effects from local blood circulation and tissue fluid exudation. The central white area typically occurs because the negative pressure is strongest at the center of the cup, causing temporary compression and closure of capillaries. The surrounding purple discoloration results from capillary dilation and minor blood leakage forming bruising, which is a normal physiological response following cupping. If severe pain, skin ulceration, or symptoms lasting longer than one week occur, medical attention should be sought promptly.

During cupping, the negative pressure inside the cup applies uniform pressure to the skin and subcutaneous tissues. The pressure is most concentrated at the center, leading to instantaneous compression and closure of local capillaries, preventing normal blood flow and resulting in a white appearance. In the surrounding areas, where pressure is relatively milder, capillaries dilate under negative pressure, allowing some red blood cells to leak into the tissue spaces and form purple bruising. Together, these effects create the characteristic pattern of a purple ring with a white center.

The intensity of this phenomenon is related to the strength and duration of cupping, as well as individual constitution. Greater suction force and longer application time may lead to more pronounced color contrast. Individuals with colder constitutions or poor circulation may develop deeper purple bruising and a more prominent white center. Generally, no special treatment is required, and the marks will gradually fade as the body's metabolism processes them.

After cupping, gently applying a warm towel to the affected area can help improve blood circulation and relieve muscle tension. Avoid bathing immediately or exposure to cold water, keep the skin clean and dry, and wear loose, breathable clothing to minimize friction. Drinking warm water regularly can support bodily metabolism. Avoid scratching or pressing on the treated area, allowing the skin to heal naturally.