A child’s fever for a while may be caused by respiratory tract infection, systemic lupus erythematosus, tuberculosis and other causes. 1. Respiratory tract infection: the child’s body may have a respiratory tract infection, common infectious factors are viruses, bacteria, mycoplasma, chlamydia, accompanied by coughing, coughing up phlegm, etc., which can cause the baby’s fever to recur in bursts. 2. Systemic lupus erythematosus: patients with systemic lupus erythematosus, long-term use of immune agents and glucocorticoids are prone to secondary infections, in the event of activity or changes in the condition of the baby is prone to a bout of fever. 3. Tuberculosis: children with tuberculosis, can not effectively inhibit the body of Mycobacterium tuberculosis, may induce recurrent fever, usually manifested in the afternoon low fever, will be a burst of fever. Children’s fever for a while, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.