Most of the stable nephrotic syndrome patients can eat watermelon, but the following cases are not suitable for too much watermelon or watermelon should be banned: a high degree of edema, a large number of patients with proteinuria is not suitable for watermelon, watermelon in the water content is relatively high, easy to aggravate the watermelon after eating watermelon, severe cases can cause acute heart failure. Second, the combination of type 2 diabetes patients, it is not appropriate to eat more watermelon, watermelon sugar content is relatively high, easy to lead to elevated blood sugar. Third, the application of glucocorticoids or tacrolimus and other immunosuppressive drugs, patients, it is not appropriate to eat too much watermelon, these drugs can lead to pharmacogenetic diabetes, eating watermelon is likely to lead to increased blood sugar.