Winter melon has the effects of diuresis and heat purification, cassia seeds have the effects of clearing the liver and improving eyesight (clearing liver fire to promote eyesight recovery), laxative, rose has the effects of promoting qi and relieving stagnation (relieving stagnation by unclogging the qi), harmonizing the blood and relieving pain, and lotus leaves have the effects of clearing summer heat and removing dampness and stopping bleeding by cooling and moisturizing the blood (cooling and moisturizing the blood, preventing bleeding). Combining the four medicines to make tea has similar effects to those mentioned above, but the active ingredients in the tea are limited, making it difficult to exert the efficacy of treating the disease. Note that cassia seeds should not be used by people with Qi deficiency and loose stools (thin and unformed stools); dong quai and cassia seeds are cold medicines, overdose of which may cause abdominal pain, diarrhea and other symptoms. The use of the above drugs need to be under the guidance of a physician, do not take blindly, so as not to cause adverse consequences.