Cough phlegm phenomenon can be appropriate to eat watermelon, first of all, the reason why there will be cough phlegm phenomenon, because there is inflammation of the respiratory system, this time to eat watermelon, cough phlegm, has a certain degree of help, because the watermelon has the effect of clearing away the heat and detoxification, for the alleviation of the inflammation, has a mild adjuvant therapeutic effect. The water content of watermelon is particularly rich, eat more fruits with more water content, or drink more water, can help moisturize the airway, promote the discharge of phlegm, can dilute phlegm, for coughing phlegm also has a certain help. Watermelon also has a diuretic effect, diuretic at the same time can help the body discharge excess toxins, to promote the recovery of inflammation, also has a very good effect. So cough with phlegm symptoms, you can eat appropriate watermelon. But if you usually have diabetes, or elevated blood sugar, even if there is a cough with phlegm, you can not eat watermelon, will dramatically increase blood sugar.