Wash and mash Xia Gu Cao, then use medical dressing or disposable medical gauze to wrap and apply to the affected area. Xia Gu Cao is a heat-clearing medicine with pungent, bitter and cold flavor, which has the effect of clearing liver and fire, brightening eyes, dispersing knots and eliminating swelling, and is often used in the treatment of eye redness and swelling caused by inflammation of the liver, headache and dizziness, etc. It has no obvious toxicity and side-effects, and can be used as a topical compress. Xia Gu Cao has the effect of clearing away heat and detoxification, eliminating swelling and dispersing knots, and has a certain therapeutic effect on heat and pain, and the specific effect is different depending on the individual’s physique. It is important to note: the drug should not be used blindly, a single external application of limited efficacy, physical discomfort need to consult a doctor, under the guidance of the doctor to use the drug. The use of drugs to prevent allergies, if there is skin discomfort, stop using immediately.