If you have symptoms of cold in winter, you can eat watermelon in moderation if you are at home and it is warm. First of all, watermelon has more water content, and you need to drink more water during the cold, which can promote the healing of the cold. Secondly, the vitamin content of watermelon is particularly high, especially vitamin C, which can help the body strengthen its resistance and help the body fight against foreign viruses and bacteria, thus promoting the healing of colds. Watermelon has a diuretic effect, which can help the body excrete toxins from the body and reduce the discomfort brought about by the cold, and watermelon has a clearing and detoxifying effect, which can relieve the sore throat and fever brought about by the cold, and the effect is better. So during a cold, if the house is warm, you can eat watermelon. If the surrounding environment is cold, it is not recommended to eat watermelon, which is a cool fruit and can easily lead to nausea, vomiting, abdominal pain and diarrhea.