The cause of fever in children after coughing is mainly due to uncontrolled disease, but may also suggest the appearance of a new infection, caused by cross-infection. This situation should be relatively aggravated compared to the original situation, and it is important to go to the hospital for timely examination and give symptomatic treatment.1. Uncontrolled disease: The child’s original cough is a mild infection, and as the condition changes and is not treated in time, the disease may develop further if it is not controlled. For example, early coughing may be due to upper respiratory tract infection and pharyngeal inflammation, and because the symptoms are not effectively controlled and develop further into the trachea, bronchi and lungs, the symptoms will become more pronounced and feverish reactions will occur, and the child should immediately go to the hospital for timely related examinations. 2. Cross-infection: During a child’s cough, the respiratory tract mucosa is congested and edematous, and other infections are likely to occur, and if he or she is exposed to If they come into contact with other viruses, secondary infections may occur on top of the original disease, causing the patient to develop a fever after coughing. When a child develops fever after coughing, parents should take the child to a hospital respiratory medicine department for a pharyngeal swab, chest CT, and other related tests, and then provide targeted treatment based on the report results. During this period, parents should be careful not to let their children get too cold or too hot, and they can eat some light, easily digestible food, such as shrimp porridge and millet porridge, to avoid aggravating the symptoms.