2. The efficacy of watermelon. Watermelon has the effects of clearing away heat and relieving summer heat, removing annoyance and quenching thirst. Watermelon contains a lot of water. If a female friend eats a sweet, sandy and moist watermelon when acute fever causes fever, thirst, sweating and irritability, the symptoms will be improved immediately. Therefore, eating more watermelons has the effect of clearing away heat and relieving summer heat, removing troubles and quenching thirst. Watermelon can increase the nutrition of patients with nephritis. Sugar and salt contained in watermelon can induce diuresis and eliminate kidney inflammation, and protease can transform insoluble protein into soluble protein, which can increase the nutrition of patients with nephritis. Watermelon has the effect of lowering blood pressure. Watermelon also contains substances that can lower blood pressure. Therefore, hypertensive women often eat watermelon, which can lower blood pressure. Watermelon has the effect of treating jaundice. After eating watermelon, the urine volume will increase obviously, which can reduce the content of bile pigment and make the stool unobstructed, which has a certain effect on treating jaundice.