Eight-month-old babies are relatively young, in general, the common causes of fever are cold, indigestion, respiratory infections, etc., specifically the following: First, cold: common is the fever formed by the cold caused by cold, common is the early childhood emergency rash, when infected by a virus, the baby will have repeated fever within 3-5 days, after the fever subsides, there may be a viral rash, the Called toddler rash, more common. Second, indigestion: common in the digestive system factors, due to improper feeding caused by indigestion, or eating unclean food caused by acute inflammation of the gastrointestinal tract, and then due to viral infections form viral enteritis and other diseases, there will also be fever symptoms, in addition, there may be accompanied by nausea, vomiting, bloating, diarrhea and other digestive tract conditions. Third, respiratory tract infections: commonly due to lower respiratory tract infections, coughing and coughing due to pathogenic bacterial infections, the symptoms of fever will also appear at this time.