Once. When taking a Yao bath, the water pressure will moderately oppress the whole body, which can achieve the effect of eliminating edema all over the body. Moderate water pressure and water temperature can help the human body strengthen various functions of viscera, promote blood circulation, and soak once a week, which can maximize the effect of health preservation. Yao bath is a series of health care functions, such as dredging acupoints, expelling wind and cooling, infiltrating bones and muscles, and enhancing human body resistance, through the warm, mechanical and chemical effects of water and the therapeutic effects of medicinal vapor and liquid fumigation.