Fever and cough are common symptoms in early childhood, and almost every child has experienced coughs and fevers of varying severity as they grow up. When a baby is sick, it can touch the nerves of the whole family, just as a low fever and cough can be equally disturbing to parents. Fever and cough are mostly seen in respiratory tract infections, such as upper respiratory tract infections also known as colds, including pharyngitis, tonsillitis, rhinitis, and sinusitis can all present with fever and cough. Then there is the lower respiratory tract inflammation bronchitis, bronchitis, and pneumonia, which also cause fever and cough. The fever itself is a protective response of the body against pathogenic bacteria. The pathogen enters the body and the body clears the pathogen by mobilizing the immune response, so fever appears. The level of fever is not consistent with the severity of the disease. If the baby is in good spirits, it suggests that the illness is not serious and upper respiratory tract infection is considered. If the cough is frequent and the mental state is not good, even if the fever is low, pneumonia is more likely and requires a medical visit for blood tests and chest X-ray. The causes of fever and cough in babies are viruses, bacteria, mycoplasma, etc. Viral infections are most often seen in small infants. Treatment plans need to be evaluated by a pediatrician. Although fever and cough are relatively common in babies, these two symptoms alone cannot determine the severity of the condition, so parents should not ignore them and go to a regular hospital in a timely manner.