If the baby fever and no cough, runny nose, sneezing, headache and other symptoms of the emergence of this situation belongs to the simple fever, there are several reasons: 1, most of the reasons are due to the baby during the day is too tired, or the indoor temperature is too low, the child catching a cold caused by the fever; 2, the baby’s resistance is low, viral infections and so on can also cause asymptomatic fever, the different viruses caused by the different symptoms, some of the Viral colds do not have a fever, only sneezing, sneezing or coughing; 3, may also be due to acute gastroenteritis, acute respiratory tract infections, neurological disorders, etc., at the same time, parents should also check whether the child’s body rashes, allergies are serious can also cause this fever; 4, you can also observe whether the child has the symptom of frequent urination, urinary symptoms, if there is an infection of the urinary system, can also make the baby appear Asymptomatic fever.