Cassia seeds and chrysanthemum tea has the effect of clearing heat, calming the liver and brightening the eyes. Cassia seeds are sweet, bitter, salty and slightly cold in nature. It belongs to the liver and large intestine meridians. It has the efficacy of clearing heat and improving eyesight (removing heat from the body and promoting the recovery of eyesight), moistening the intestines and relaxing the bowels. It is often used in the treatment of redness and astringency of the eyes, darkness and uncertainty of the eyes, shyness and tearfulness (the eyes are afraid of light and often shed tears), headache and dizziness, and dryness of the bowels, etc. It is often used in the treatment of wind-heat symptoms. The drug is used for wind-heat evidence often with chrysanthemum, cicada yi. Cassia seeds are cold in nature, and should not be used for a long time by people with cold constitution, and adverse reactions are rare in clinic. Chrysanthemum is sweet, bitter and slightly cold in nature. It belongs to the liver and lung meridians. It is used for dispersing wind and heat (dispersing wind-heat and heat-expelled evils), clearing the liver and improving eyesight (clearing liver fire to promote vision recovery). Clinically used for external wind-heat, headache and dizziness, redness and pain in the eyes, and blurred vision. Chrysanthemum and cassia seeds are commonly used in the treatment of redness and pain in the eyes and blurred vision due to deficiency of liver yin or external wind-heat. There is no record of adverse effects of this drug. The person who has a deficiency of qi and cold stomach, and who has little food and diarrhea should use it sparingly. In summary, cassia seeds and chrysanthemum can be used together to synthesize the functions of the two, to achieve the effect of calming the liver, clearing heat and brightening the eyes. If you need to use cassia seeds and chrysanthemum, should be used under the guidance of a doctor, do not blindly use drugs or change the use of drugs, so as not to cause adverse effects on the body.