Edible baking soda can be used to soak your feet any way you want, as long as the water is not too hot, too concentrated, and you are not allergic to baking soda. Baking soda, or lye, or sodium bicarbonate, is an alkaline substance that, when dissolved in water, makes the water alkaline. Edible baking soda can generally be dissolved in water and soaked in the feet, which can improve the acid-alkaline environment of the feet and temporarily lower the pH value of the feet. However, in general, baking soda foot soaks have no special medical effects. With baking soda foot soak, mainly warm stimulation, can diastole foot blood vessels, relieve the problem of cold feet. But be careful that the water temperature should not be too high to avoid burns. If you are a diabetic, do not soak your own feet, because diabetics are likely to have problems with inaccurate temperature sensation. In addition, do not consume too high a concentration of baking soda when soaking water, so as not to lead to too much alkaline and irritate the skin of the feet, especially if there is a break in the skin of the feet, it may be irritated, which may lead to pain and discomfort. If you are allergic to baking soda, it is forbidden to soak your feet in baking soda.