Purple-black color of the can mark after cupping indicates the existence of blood stasis and cold condensation in the patient’s body.
The color change of the can mark after cupping has certain diagnostic value, which can reflect the disease condition of the body. The can mark is purple-black with darkness, which indicates that the blood stasis is more serious, and the menstrual flow is not smooth; the can mark is purple with plaques in the middle, which indicates that the local cold congeals and the blood is stagnant.
Usually, the black and purple color of the back can fade away gradually in a few days. After cupping, you need to pay attention to the protection of the local skin, and avoid bathing, getting windy and cold within 24 hours. The length of cupping time should be determined according to the age and physical condition of the individual, and cupping treatment should be operated by a professional physician to avoid accidents such as burns.