Coining or cao gio, is an alternative form of medicine most commonly practiced in Southeast Asia. The practice involves rubbing heated oil on the skin, most commonly the chest, back, or shoulders, and then vigorously rubbing a coin over the area in a linear fashion until a red mark is appears. Coining is believed to allow a path by which a ‘bad wind’ can be released from the body. This ‘wind’ is believed to be the cause of the patient’s illness. Coining can be used to treat a variety of minor ailments including fever, chills, headache, colds, and cough.
my mom use to do this on me.