Some patients in the intravenous infusion, due to intravenous infusion operation is not standardized, puncture blood vessels or some drugs may have a certain stimulating effect, the injection site will be swollen, this situation can be used to apply a potato slice for external application. General can be applied for 20-30 minutes, can be repeated several times a day, can play a role in reducing swelling. As potato chips contain vitamins and trace elements, they can reduce swelling, but the effect of swelling is relatively limited. If the soft tissue of the skin is swollen, in addition to using potato chips for external compresses, you can also use magnesium sulfate solution for wet compresses, magnesium sulfate solution has a high osmotic properties, which can reduce the edema of the soft tissue. In addition, if local pain occurs due to vascular irritation during infusion, you can also use topical Cipro ointment to reduce local swelling.