Children who are not in good spirits and are always sleepy after a fever may be caused by consuming a lot of energy during the fever and taking medications. It can be relieved by ensuring that the child has enough sleep, supplementation and so on. 1. During the period of fever, the child consumes a lot of energy and calories, and fails to replenish them in time, so there is a situation that the child is not in a good mental state after the fever and is always sleepy. At this time, the child should be allowed to rest, timely supplementation of food rich in protein and vitamins, such as milk, eggs, fresh fruits and vegetables, etc., to improve the child’s immunity. 2. If the child is taking antipyretic drugs or other medications, after the fever is gone, due to the drug residue, the child may be drowsy, no spirit and so on. At this time, you should also let the child rest well, and let the child drink more water to promote the discharge of drugs. If your child’s symptoms of poor mental state and sleepiness are not relieved by the above methods, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examinations, clarify the cause of the disease and target treatment.