The causes of fever and chills usually include upper respiratory tract infections, dysfunction of the thermoregulatory center or endocrine disorders, etc., which require timely medical treatment. The most common cause of hot and cold body is upper respiratory tract infection fever precursor period, so it will be accompanied by the phenomenon of chills; secondly, when because of trauma, cerebral hemorrhage or cerebral infarction and other conditions caused by cranial brain damage, the hypothalamus thermoregulation center may be dysfunctional, it will also occur in the body of symptoms of hot and cold body. In addition, endocrine disorders can also lead to hot and cold body, such as perimenopausal syndrome patients, due to the imbalance of estrogen and progesterone and may appear hot and cold symptoms. These are just some of the common causes. If you feel that your body is hot and cold, you should take your temperature. If you have fever or if your symptoms persist or recur, you should seek medical attention as soon as possible, make a clear diagnosis and follow the doctor’s instructions for standardized treatment.