Sleeping with a red face and fever is considered to be related to physiological factors, but may also be related to pathological factors such as allergies, colds, perimenopausal syndrome, etc., to exclude physiological factors, we need to consult a doctor in a timely manner. 1. Physiological factors: Sleeping with redness and warmth is considered to be related to physiological reasons, such as room temperature is too high; or whether returning from the cold to a room with a high temperature causes the facial blood vessels to dilate and congest. If the room temperature is too high, the face may be hot and red. 2. Pathological factors: It may be caused by allergies, colds, perimenopausal syndrome, etc., but of course we can’t rule out other problems. In this case, it is best to use a thermometer to measure the body temperature to see if there is a fever or not. These are only some of the common causes. If the symptoms persist or recur, you should consult a doctor. After a clear diagnosis, follow the doctor’s instructions to standardize the treatment.