One-year-old baby suddenly fever, took ibuprofen fever 24 hours after the fever is reduced and then fever is usually associated with suffering from acute tonsillitis, upper respiratory tract infections, pneumonia and other related diseases are not effectively controlled. 1. Acute tonsillitis: often manifested fever, sore throat, chills, etc., tonsils with pus spots, may lead to a one-year-old baby suddenly fever took ibuprofen fever 24 hours after the fever again. 2. upper respiratory tract infection: often show low fever, nasal congestion, cough, etc., may lead to a one-year-old baby suddenly fever took ibuprofen fever 24 hours after the fever again. 3. Pneumonia: often show fever, cough, shortness of breath, dyspnea, etc., may lead to a one-year-old baby suddenly fever took ibuprofen fever 24 hours after the fever again. A one-year-old baby suddenly fever, took ibuprofen fever 24 hours after the fever again, 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, give targeted treatment or treatment.