1, the foot patch is attached to the foot as the name implies. Because the plantar skin is thin and there are many reflection areas, the foot patch is generally attached to the sole of the foot and is easy to absorb.
2. In other places, the fat layer is thick or uneven, so it is not easy to stick it firmly, and the foot patch can not be well absorbed and play a role. Generally, it is not recommended to stick it in other places.
3. In addition, it is a physical phenomenon that the foot patch turns black and oily during use. It is mainly the reaction of foot powder when it is damp and hot. Similar cosmetic powder is not easy to absorb, but oily is easy to absorb. The reason why the foot patch is not black after use is not that it is not firm or sweaty. It is recommended to stick it firmly after soaking feet in hot water.
Schematic diagram of plantar reflex zone: