You can eat watermelon when you have fever and sore throat, and you can eat more watermelon. First of all, watermelon has a good effect of clearing heat and detoxification, which can relieve the inflammation of the throat and is helpful to relieve fever and sore throat. Secondly, the water content of watermelon is relatively high. When you have fever and sore throat, you should drink more water and eat more fruits with higher water content, so you can eat watermelon. Once again, watermelon is diuretic, which can take away part of the heat and eliminate excess toxins from the body, which is very helpful to promote the healing of fever and sore throat. Therefore, if you have a fever or sore throat, you can eat more watermelon to relieve it. If you have a fever or sore throat, you should have a blood test to clarify the type of infection. According to the type of inflammation, choose the appropriate antibiotics or antiviral drugs to carry out anti-inflammatory treatment for better results. If the temperature of fever exceeds 38.5℃, you should also use ibuprofen to reduce fever.