Is it harmful to use Sanfu Tie for more than six hours? Sanfu Tie is an external treatment method based on traditional Chinese medicine theory and is often used to treat rheumatism, waist and leg pain and other diseases. There are certain precautions when using Sanfu stickers. If used incorrectly, it may cause certain harm. So, is using Sanfu Patch for more than six hours harmful? The following article will elaborate on the correct use of Sanfu stickers and precautions from four aspects. Correct use method (1) Clean the skin: Before applying the Sanfu patch, you need to clean the skin first to ensure that the skin