2, the efficacy of watermelon. Watermelon has the effect of clearing heat, removing boredom and quenching thirst. Watermelon contains a lot of water, if the female friends in the acute heat disease caused by fever, thirst and sweat, irritability, eat a piece of sweet and sand, water full of watermelon, the symptoms will be immediately improved. Therefore, eating more watermelon has the effect of clearing heat, removing irritation and quenching thirst. Watermelon has the effect of increasing the nutrition of nephritis patients. Sugar and salt contained in watermelon can diuretic and eliminate kidney inflammation, protease can convert insoluble protein into soluble protein, increase the nutrition of nephritis patients. Watermelon has the effect of lowering blood pressure. Watermelon also contains substances that can lower blood pressure, therefore, women with high blood pressure often eat watermelon, can play a role in lowering blood pressure. Watermelon has the effect of treating jaundice. After eating watermelon, the amount of urine will increase significantly, which can reduce the content of bilirubin, and can make the stool smooth, which has a certain effect on the treatment of jaundice.