Medicines that can be applied externally to reduce swelling and disperse knots include Xia Gu Cao and Mangniu. Xia Gu Cao has the efficacy of clearing heat and fire (removing heat and fire from the body), brightening the eyes, dispersing knots and subduing swellings. It is used for treating eye redness and swelling, headache and dizziness, night pain in the eyeballs, scrofula (mainly refers to tuberculosis of the lymph nodes in the neck), gall tumors (equivalent to tumors of the thyroid gland), and canker sores and swelling. It should be used with caution for those with weak spleen and stomach. Mangnit, with diarrhea and attack accumulation, moistening dryness and softening hardness, clearing heat and subduing swelling. It is used for treating stagnation and constipation, sore throat, mouth sores, eye redness, carbuncle sores and pain. Contraindicated for pregnant and lactating women. It is not suitable for constipation caused by no solid heat, old age and infirmity. If there is any discomfort, it is recommended to consult a doctor promptly. If medication is needed, it should be identified by a doctor and standardized treatment should be prescribed by a doctor.