1, usually there will be sweat on the soles of your feet, but it is not obvious at ordinary times and you don't pay attention.
2, the foot is thick, especially with adhesive tape on the soles of the feet, because the temperature problem will sweat.
3, the bamboo powder in the foot patch is weakly acidic, which will also stimulate the skin to sweat.
4. even if you don't need a foot patch, it is a natural phenomenon to stick it on some parts of your body for observation.