Jumping after fever may be caused by hypocalcemia, infectious toxic encephalopathy, epilepsy and so on. 1. Low blood calcium: because after the fever goes down, there may be a lot of sweating and a large amount of electrolyte loss in the body, which causes the muscle excitability of the whole body to increase and the jumping occurs, and this situation needs to be given positive rehydration and calcium treatment as soon as possible. 2. Chronic toxic encephalopathy: Because fever may be infected by viruses, bacteria and bacterial infections, pathogenic bacteria break through the blood-brain barrier into the brain tissue, brain cells are severely damaged resulting in a toxic reaction of the brain caused by jumping. 3. Epilepsy: After the fever, the brain cells are damaged, causing abnormal discharges, inducing epileptic seizures and causing jumping. It is recommended to consult a doctor in time to identify the cause of the disease and follow the doctor’s instructions.