The use of foot Guangsan foot soak appeared swollen feet for a few days may be caused by allergies, should immediately stop the drug and go to the hospital to find out the cause of the disease, may also be due to other reasons. Foot Guang San has the effect of clearing heat and drying dampness, killing insects and converging sweat, and is mainly used for the treatment of thickening of the skin of the hands and feet, peeling and flaking, itching and smelly sweating caused by damp-heat underflow (dampness and heat invading the intestinal tract, bladder, pubic area, lower limbs, etc.). This product blister type (mainly rice-sized blisters, itching), vesicular type (fingers, toes between the moist white, flushed after peeling skin, itching, etc.) tinea pedis is prohibited. Children, pregnant women are prohibited. In addition to allergy, if the patient’s foot itself has a disease, such as skin ulceration, vesicles, etc., the use of medication to soak the feet may lead to edema; it may also be edema caused by spleen and kidney yang deficiency, accompanied by epigastric and abdominal distension, eating less, thin stools, limb warmth and so on. Specific etiology should also be referred to the patient’s medical history to determine the synthesis, it is difficult to give here. If the foot disease is really uncomfortable, please go to the doctor, do not blindly use drugs, so as not to aggravate the condition.