It is common for babies to have shortness of breath and possibly an increased heart rate when they have a fever. A fever in a baby indicates a bacterial or viral infection, which should be actively treated to reduce the fever while controlling the infection. The principle of fever reduction is that when the body temperature exceeds 38 degrees and there is obvious discomfort, the child can take antipyretic drugs, commonly used are ibuprofen suspension or Merlin or acetaminophen or Tylenol, if the child’s body temperature increases but there is no discomfort, the child can not use antipyretic drugs. there is no discomfort, you can do without the use of antipyretics,. Physical cooling method used to be a very common method to reduce fever in clinical and life, mainly including warm water rubbing, alcohol rubbing, cold towel on the head, or ice bag cold compress, etc. However, the above methods have been clearly not recommended because they may cause obvious discomfort to the child, so when the child has a fever, try not to use the above physical cooling methods. After the fever is reduced, the child’s body temperature returns to normal and the shortness of breath improves, then it means that the shortness of breath is caused by the fever. If the child’s fever is reduced and still accompanied by shortness of breath, consider that the child may have a fever caused by bronchitis or pneumonia, go to the hospital as soon as possible, have the blood tests done to clarify the severity of the infection, and then choose infusion nebulization or oral medication to carry out active treatment. If the baby also has serious symptoms of oxygen deficiency, oxygen therapy is also needed. If your child has a fever and shortness of breath, first we need to rule out whether the fever is causing the shortness of breath, after the treatment of fever, shortness of breath does not improve, we should consider that the child may have a lung infection, you need to go to the hospital as soon as possible.