Two-year-old baby only fever, no other symptoms, may be respiratory tract infection or toddler emergency rash, etc., the specific analysis is as follows: 1. Respiratory infections: respiratory infections often appear at the beginning of the systemic symptoms, that is, fever, such as checking the child’s throat, localized congestion, redness and swelling is most of the respiratory tract infection caused by fever. 2. toddler rash: if the baby did not have toddler rash before, this asymptomatic fever to pay attention to the possibility of toddler rash, toddler rash is generally a high fever for 3-5 days, after the heat out of the rash, some babies may be accompanied by minor respiratory or gastrointestinal symptoms. Two-year-old baby only fever without other symptoms, there may be other reasons, parents are advised to take the baby to the hospital for examination, according to the results of the symptomatic treatment.