1, the foot patch is mainly attached to the sole of the foot, which absorbs and stimulates the plantar reflex zone through the reaction of the foot powder bag and plantar sweat.

2. When the foot powder bag becomes wet, it will leak oil, and after it is absorbed by the sole, the residue of the foot powder bag will harden and solidify.

3. In addition, the foot patch will harden and solidify before use, which may be caused by the expired foot patch or improper storage and moisture.