It is recommended to apply potato slices externally to reduce swelling for 10 to 20 minutes, and the thickness and shape of the potato slices should be noted when using them. Potato slices have the effect of promoting blood circulation, can be used to relieve soft tissue swelling caused by trauma, can also be used for intravenous infusion caused by swelling. However, in order to avoid the external application time is too long, caused by skin allergies lead to itching and other symptoms, it is recommended that each time 10 minutes to 20 minutes can be, a day can be several times the external application. When using potato slices, it is recommended to cut them into thin slices of moderate thickness to prevent the effect of swelling. If the slices become dry or hot during use, they should be replaced promptly. In addition to using potato chips to reduce swelling, you can also follow the doctor’s instructions to use drugs to reduce swelling, you can use Yunnan Baiyao, safflower oil, etc. for treatment.