coining

Coining, also known as coin rubbing, is a traditional healing practice found in several Asian and Middle Eastern communities. The practice involves rubbing or scraping the skin with a hard object, typically a metal coin, after applying oil or lotion. The procedure is usually performed on the back, shoulders, neck, or chest and can leave deliberate linear marks or reddened skin that may persist for days.

Proponents believe coining releases heat or toxins and improves circulation, and that it can treat fever, cough, headaches, or other ailments. It is commonly described in Vietnamese as cao gio and is also reported in Chinese, Cambodian, Filipino, and other communities. It is sometimes performed on adults and sometimes on infants or young children by family members or traditional healers.

Medical perspectives: There is little scientific evidence that coining provides therapeutic benefit. The skin trauma produces petechiae and superficial bruising, which accounts for the marks. Potential risks include skin irritation, infection, cellulitis, scarring, and, if tools are shared or not properly cleaned, transmission of infections. In children, the resulting bruising can be mistaken for abuse in medical settings, so clinicians should assess context carefully.

Safety and cultural considerations: If coining occurs, tools should be clean and hands kept sterile; avoid if skin lesions, burns, bleeding disorders, or if the person is on anticoagulants. Medical advice typically discourages the practice but recognizes its cultural significance; education can help reduce risk while respecting tradition. Safer symptom relief should be discussed with a healthcare provider.