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To the Editor.—
Regarding the article by LTC Gentry W. Yeatman, MC, USA (1980;244:2748), about ca̧o gío among the Vietnamese immigrants, as a matter of interest, this procedure is also popular in Indonesia as part of traditional medicine. It is known under several names, including kerok and kerik. There is a definite Chinese influence, it being much practiced by the Chinese and those of Chinese ancestry, especially among the older generations.Coconut oil or cajuput oil is usually used as a skin lubricant. Parts of the body frequently used as the site of application are the same, mostly the back and neck, and less frequently, the chest. It seems to give a fast subjective sense of well-being if applied to patients with colds and other flu-like diseases, especially with fever and malaise, and is used in children as well as in adults as a home remedy. The darker the color
Alfred Tan. Coin Rubbing and Related Folk Medicine. JAMA. 1981;245(18):1819. doi:10.1001/jama.1981.03310430013009