In the absence of allergies, people with cold and fever can usually eat bananas. Cold and fever are caused by pathogenic microorganisms. During the period of cold and fever, you should pay attention to a light diet and balanced nutrition. Bananas are rich in carbohydrates, vitamins and dietary fiber, which can provide cold and fever patients with the necessary nutrients during the illness, which is beneficial to the recovery of the disease. Especially when the fever patients have bloating or constipation, eating bananas can promote defecation and improve constipation. Bananas are rich in potassium ions, which are high in potassium, and should be consumed with caution by patients with severe renal insufficiency who have fever or cold, to avoid hyperkalemia, which may lead to cardiac arrhythmia. In addition, bananas contain relatively high sugar content, cold fever diabetic patients need to eat in moderation, so as not to cause elevated blood sugar. Cold and fever patients should be scientific and rational diet, it is advisable to choose light, easy to digest food, moderate intake, to ensure a balanced intake of various nutrients.