Fever in the middle of the day. The first and most common cause is tuberculosis infection, which is characterized by afternoon hot flashes accompanied by coughing, sputum, and even hemoptysis. The diagnosis can often be confirmed with a chest radiograph and a tuberculin test. If you are infected with tuberculosis bacilli, it is recommended that you consult a chest hospital for standardized and adequate anti-tuberculosis treatment. Secondly, fever at noon may also be caused by other infections, as the body temperature rises gradually at noon, and is often higher than in the morning. Therefore, once there is a mild fever, it is easier to show at noon, such as ordinary bacterial or viral infections, there will also be a fever at noon. It is recommended that offline hospital consultation, combined with clinical symptoms to give targeted examination, clear diagnosis and then give targeted treatment.