When iron is extravasated by intravenous infusion, the extravasated limb can be elevated to promote venous reflux and local drug absorption, while cold compresses can be given within 24-48 hours after exudation to reduce the inflammatory reaction caused by iron machine extravasation. After 24-48 hours, hot compresses can be given to accelerate local blood circulation and promote better absorption of inflammation. At the same time, 50% magnesium sulfate wet compresses can be given, which can usually reduce the damage to local tissues by edema and promote local tissue repair. Topical medications, such as Xylitol or heparina ointment, can also be applied topically, which can usually reduce pain and accelerate the absorption of inflammation. If the amount of extravasated medication is large, local incision is required to remove the subcutaneous medication and flush it out if necessary.