No symptoms of cold. Sudden fever 39 degrees in sleep.

No cold symptoms but sudden high fever, it is recommended to first symptomatic treatment, can use warm towels to wipe the whole body, and then oral antipyretic drugs, while maintaining indoor ventilation and air flow. At the same time, let the patient drink more water, more urination can promote the body's heat excretion. After temporarily controlling symptoms, go to the hospital to do blood routine examination, clear the specific cause of the disease, follow the doctor's advice medication treatment.