The causes of fever in August may be respiratory diseases, gastrointestinal diseases, toddler emergency rash and so on. 1. Respiratory diseases: such as viral or bacterial colds, bronchitis, pneumonia and other diseases, can cause the baby fever, but also can be accompanied by nasal congestion, runny nose, sneezing, coughing, coughing and other symptoms. 2. Digestive system diseases: such as bacterial enteritis, viral diarrhea, etc. can cause fever in babies, which can also be accompanied by increased stool frequency, change in stool pattern, or vomiting and other symptoms. 3. toddler rash: eight months baby fever more common diseases and toddler rash, is caused by herpes simplex virus infection, usually fever 3 to 5 days, after the fever subsides the body began to appear rash. Eight month old child fever may also have other reasons, it is recommended to timely go to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.