2, mainly because watermelon is a big cold, many places in the autumn after the weather turned cold, and watermelon, cucumber and so on is cool food, it is not suitable to eat.

3, after the fall of the human body yang qi gradually convergence, the gastrointestinal tract of cold food adaptability decline, to eat some warm food, in order to regulate the spleen and stomach, so as not to damage the body yang qi, to the winter is relatively easy to catch a cold, diarrhea, or cold hands and feet, and so on.

4, the spleen and stomach function is weak, cold body can not eat. Because the weak are easily stimulated by the external environment, food, gastrointestinal disorders, abdominal pain, diarrhea and other digestive symptoms. Watermelon is a cold fruit, excessive cold stimulation will weaken the normal gastric motility, affecting gastric function.