Precautions for using Sanfu Patch: Summer is the season when sweating is most likely, and the hot climate makes people feel tired easily. At this time, Sanfu Patch can be used to relieve fatigue. However, Sanfu Patch is not suitable for everyone. The following are the precautions for using Sanfu Patch: 1. The skin must be cleansed before use. Before using Sanfu Patch, you must wipe the skin carefully and remove any accumulated water or sweat. If not cleaned, the substances in the patch may not be fully absorbed and may irritate the skin more. 2,