In the vast majority of cases, allergies in children do not cause fever because they are caused by excessive release of histamine and other substances in the body, which can lead to hives, even low blood pressure, pallor and anaphylactic shock. Some allergies can also cause children to develop eczema, allergic rhinitis, allergic cough, and even bronchial asthma, which do not cause children to develop fever. Most of the causes of fever in children are related to infectious factors, such as infection with viruses, bacteria, tuberculosis bacilli, etc., which can cause fever, and general allergic factors do not cause fever.