The efficacy of cassia seed lotus leaf tea is to clear heat and brighten eyes (to get rid of the body heat evil, promote the recovery of vision), clear the summer and benefit dampness, etc., with the role of relieving eye redness and astringent pain, summer heat and thirst, summer dampness and diarrhea (diarrhea caused by summer feeling the summer dampness) and other conditions. 1. Cassia seeds are the dried mature seeds of the leguminous plant Cassia obtusifolia or Cassia sinensis (small cassia). The drug has the effect of clearing heat and brightening the eyes, laxative and laxative. Clinically, it can be used in the treatment of eye redness and astringency, shyness and tearfulness (eyes afraid of light, often tearing), headache and dizziness, darkness and uncertainty of the eyes, constipation and other diseases. The drug is cold, so patients with cold spleen and stomach (spleen and stomach weakness and cold) diarrhea should not be used. 2. Lotus leaf is the dried leaf of Lotus japonicus, family Water Lily. It has the efficacy of clearing summer heat and removing dampness, elevating Qing Yang (conveying nutrients from digested food to the head and face), cooling blood and stopping bleeding (cooling and moistening the blood to prevent bleeding), and can be used in the treatment of summer-heat and thirst, summer-dampness and diarrhea, diarrhea due to spleen deficiency (diarrhea caused by weak spleen function), epistaxis (vomiting of blood due to blood-heat and nosebleed), and blood in the stool and leakage of blood. The adverse effects of the drug are not clear. In conclusion, Cassia Seed and Lotus Leaf Tea has the efficacy of clearing heat and clearing summer dampness, but it should be noted that the efficacy of making tea is limited and it cannot replace the medication to treat diseases. If necessary, it is recommended to go to a regular hospital, under the guidance of a professional physician to identify the treatment.