The main efficacy and function of scallion white is to relieve exterior sweating, pass Yang and dissipate cold. Onion white is pungent and warm in nature, belonging to the stomach meridian and lung meridian, it can relieve sweating, and it is relatively calm in nature and weak in strength, suitable for wind-cold cold and flu with fever, fear of cold and light evidence, it can be used alone, or together with other medicines, to sweat and relieve sweating (through sweating to relieve the body surface of the evil qi) purpose. Onion white can promote Yang and dispel cold, promote Yang qi, so that Yang qi can flow internally and externally, up and down, treating the extremities syncope (unconsciousness, accompanied by cold limbs, even to the elbows and above the knees) caused by yin-sheng and yang, and facial redness with a faint pulse. The adverse reactions and contraindications of Onion White are not clear, and taking Onion White requires a doctor’s guidance.