Darling 20 months have a fever suddenly how to do without cold symptom

20 months baby has no cold symptoms suddenly fever, consider the baby's body caused by other inflammation, such as tonsillitis, acute gastroenteritis, etc., need to be treated according to different diseases, such as acute gastroenteritis caused by the baby can drink more water to prevent dehydration, and give the baby to take Saccharomyces boulardii treatment.