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Wearing a green hat: Like cupping, it is a common health care method in Chinese medicine. Many health clubs will also have this kind of project. Many people will go to fitness clubs regularly, which is very comfortable for eliminating fatigue, relieving headaches, curing colds and fever, eliminating dampness and dredging meridians.
The operation method is very simple, and no instruments are needed. All you have to do is use your fingers. Pull up with index finger and middle finger, let go, and repeat the process. There may be some pain during the process, but this is normal. Don't worry and be afraid.
Although the operation method is simple, there are many skills. Improper operation will get twice the result with half the effort. If conditions permit, it is recommended to go to a health club, find a professional masseur, or consult a professional in detail before proceeding.
Precautions: Temporary local pain and red marks will appear after strangulation. Don't worry. Usually it will subside by itself within a week. Don't scratch and cause inflammation until it subsides. If you have special discomfort, you need to see a doctor in time.
References:
Health care-Baidu Encyclopedia