May watermelon eaten usually does not cause fever, eating watermelon fever may be acute gastroenteritis, gastrointestinal cold, as well as upper respiratory tract infection and other causes. May watermelon eaten usually does not cause fever, if the May watermelon spoilage, patients may consume abdominal pain, diarrhea, vomiting, fever, fatigue, headache and other manifestations of acute gastroenteritis. In addition, patients with gastrointestinal colds may have nausea and vomiting, decreased appetite, fever, diarrhea and other symptoms after eating watermelon. In addition, those who suffer from upper respiratory tract infections, heat stroke, hyperthyroidism and other diseases may have fever symptoms themselves, independent of whether or not they use watermelon. It is recommended that when a fever occurs after eating May watermelon, immediately seek medical attention to clarify the cause of the disease and follow the doctor’s instructions for treatment. In addition, patients usually need to eat fresh watermelon, should not eat spoiled watermelon. And patients should rest more and drink more water after fever symptoms.