The cause of recurrent fever in children taking Merlin is mainly due to uncontrolled infection. In this case, the following measures can be used to relieve the situation: first, continue to apply Merlin to the child. Because the infection cannot be eliminated at once, it is necessary to continue to give Merlin to children whose temperature exceeds 38.5°C in the axilla until the inflammation is controlled. Second, children should be given timely anti-infective medications. If the fever in children is caused by influenza virus, apply oseltamivir granules in time; if it is caused by serious bacterial infection, apply cephalosporin in time; if it is caused by Mycoplasma pneumoniae infection, erythromycin can be applied to children at this time.