Babies do not cough and do not have a runny nose, but the possible causes of fever include teething, vaccinations and other non-disease causes, as well as toddler rashes, gastroenteritis and other disease causes. 1. Non-disease causes: teething, vaccination and other non-disease causes, can also cause fever in babies, more than less than 38.5 ° C, mental, sleep condition is good, not accompanied by other symptoms of discomfort, parents can reduce clothing, reduce room temperature, increase drinking water symptomatic antipyretic. 2. Acute rash in young children: acute rash in young children is caused by viral infections, the disease is mostly manifested as unexplained recurrent high fever, up to 39 ° C, lasting about 3 days can be self-reduction of fever, after the fever is reduced, the whole body appeared scattered rash, the baby’s spirit, sleep is good when the fever is reduced. 3. gastroenteritis: bacteria, viruses and other causes of gastrointestinal infections also often cause fever, accompanied by diarrhea, abdominal pain, vomiting and other symptoms. The baby does not cough and runny nose, but fever, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.