There are still many reasons for cough with fever, the most common ones are as follows: First, common cold, common cold can cause cough and low fever, at this time the cough is without sputum, or there is a small amount of white sputum. Secondly, if the cough is heavy, with high fever and yellow sputum, then it is usually bacterial bronchitis or bacterial pneumonia. Third, if the cough is prolonged, especially if it is accompanied by low fever, night sweats, fatigue, and loss of weight, you should pay attention to whether it is tuberculosis. The identification of these three requires a visit to a professional medical institution, a hospital for blood tests and a chest X-ray for differential diagnosis. You should never simply assume that it is a cold because of cough and fever, and treat it with common medications, which will delay the disease.