Donggua lotus leaf tea has the effect of diuretic, clearing heat, clearing summer and resolving dampness. There is a difference between medication brewed tea and decoction use, it is difficult to achieve the above effects, it is recommended to follow the doctor’s advice to use the drug. Dongguan is also known as winter melon, white melon. Taste sweet, light; sex slightly cold. Attributed to the lung, large and small intestine, bladder meridian. It has the effects of diuretic, clearing heat, resolving phlegm, generating fluids and detoxification, and is mainly used for the treatment of edema and distension, phlegm and asthma, summer heat and boredom. It is forbidden for those who have cold kidney and coldness, and those who have long been ill (nocturnal spermatorrhea without dreaming). Lotus leaf is bitter in flavor, flat in nature, and belongs to liver, spleen and stomach meridians. It has the efficacy of clearing summer heat, removing dampness, cooling blood and stopping bleeding (cooling and moistening the blood to prevent bleeding), and is mainly used for the treatment of summer-heat and thirst, spleen deficiency and diarrhea (diarrhea caused by weak spleen function) and other diseases. It is contraindicated for those with deficiency.