Can Guo Canshitang's old plaster be used many times?

Due to the time limit of application and the process of adapting the skin to breathing, black plaster can quickly penetrate into bones, reduce swelling and relieve pain; Plaster is absorbed through the skin and reaches the painful place through osmotic technology. When used for the first time, the drug effect is basically absorbed by the human body, and it can be repeated twice at most. It is not meaningful to reuse it, so it is recommended that you do not reuse it when applying black plaster. How to maximize the efficacy of plaster? Here, I'll tell you a little coup. Don't throw away the plaster after you use it. You can put the plaster into the foot basin and soak your feet with hot water, because the black plaster in Longhu Yubaotang contains dozens of Chinese medicines for promoting blood circulation, removing blood stasis, relaxing the channels and activating collaterals. After soaking in hot water, the remaining Chinese medicine ingredients can be released, which is equivalent to doing a Chinese medicine foot bath, without wasting, killing two birds with one stone.