hib generally refers to haemophilus influenzae type b vaccine, after playing haemophilus influenzae type b vaccine fever, mostly belongs to the normal phenomenon, to take physical cooling, medication and other ways, general fever in three days after the self-relief, no need to take special treatment. If the fever is not relieved in more than three days, it is necessary to consult a doctor in time to rule out the possibility of viral or bacterial infections and other causes of fever. Haemophilus influenzae type B (Hib) vaccine is a vaccine mainly used to prevent infectious diseases caused by Haemophilus influenzae type B (Hib). Common adverse reactions include fever, irritability, lack of appetite, and pain, redness and swelling at the injection site. If the body temperature does not exceed 38.5℃, physical cooling may be appropriate, choosing wet towel to ice the forehead or wipe the local skin. If the body temperature exceeds 38.5 ℃, patients need to take oral antipyretic drugs under the guidance of the doctor, such as ibuprofen, acetaminophen and so on. Physical cooling and medication are needed. If the fever persists for more than three days and is not relieved, it is recommended to consult a doctor, complete blood tests, chest radiographs and other tests to determine whether the fever is caused by viral or bacterial infections.