1, the foot patch is not black after use. It may be that it is not tightly attached to the skin, and it is not firmly attached. Or there is no sweat on the sole of the foot, which can't react with the foot powder bag and can't be absorbed.
2. The function of the foot patch is not necessarily reflected in blackening, but through the absorption and stimulation of the plantar reflex zone, it helps the body to enhance its excretory function and detoxify and eliminate dampness through normal channels. Scientifically speaking, more than 90% of human waste is excreted by oneself.
3. In addition, the fake foot patch takes advantage of consumers' desire to see the effect of black oil, so various black oily substances are added to the foot patch.
4. Finally, it is suggested to use the foot patch reasonably, and don't be superstitious and lead to high expectations, resulting in the psychology of being deceived.