Symptoms of hot and cold can be caused by abnormal functioning of the thyroid gland, viral or bacterial infections in the body, colds, etc. The thyroid gland can become dysfunctional if its secretion is too high or too low. Excessive or low thyroid secretion in the body will cause the thyroid gland to become dysfunctional, which in turn will lead to endocrine system dysfunction, resulting in symptoms such as tiredness of the limbs, hot and cold. Bacterial or viral infections in the body will affect the body’s immune function, which will lead to abnormal function of the body temperature regulation center, causing the body temperature to be hot and cold at times. When the body cold caused by fever, due to the body temperature rise, will lead to the skin surface capillary contraction, which will cause local cold symptoms, but the thermoregulatory center is still regulating the body temperature to make the temperature drop, so there will be a cold and hot situation. If the body appears cold and hot symptoms, timely to the hospital in order to clarify the cause of the disease and actively cooperate with the doctor’s treatment.