Shivering in the middle of the night may be due to seizures, which can occur in patients with a history of recurrent seizures lasting no more than 5 minutes. If the patient has a fever, the patient’s temperature should be monitored if necessary. If the temperature is elevated, the cause should be further analyzed, such as bacterial or viral infections, and may be caused by lung infections or urinary tract infections. Patients with encephalitis or meningitis may also have these symptoms. Patients with encephalitis may also have somatic symptoms, including sensory and motor deficits in the limbs, as well as dizziness and balance deficits, and the patient’s temperature may not exceed 39°C. If meningitis is considered, the patient may present with severe headache, nausea, vomiting, and signs of meningeal irritation, including cervical tonicity, positive Kernig’s sign, and positive Bruskitzin’s sign. If necessary, pathogenic examination of cerebrospinal fluid is taken to clarify the diagnosis.