A body temperature of 35.5°C is considered abnormal, and can be normalized through rewarming treatment, heat preservation treatment, as well as treatment for underlying diseases and primary illnesses. When the human body is in a low temperature state, the first need to clarify the cause of hypothermia, and then take measures to deal with it. For hypothermia caused by external environmental factors, the body can be warmed up by drinking warm water, eating food, taking warm baths or using electric blankets. If the hypothermia is caused by underlying diseases and primary illnesses, it is necessary to treat the underlying diseases and primary illnesses in order to normalize the body temperature. For example, if the body’s basal metabolic rate is too low, you can increase the basal metabolic rate through appropriate exercise; for adrenocortical insufficiency, hypothyroidism and other diseases with low basal metabolic rate, you can supplement the corresponding hormones to improve the low body temperature. If the body temperature is abnormally at 35.5℃ for a long period of time and uncomfortable symptoms appear, it is recommended to consult a doctor for a clear diagnosis and take appropriate treatment under the doctor’s guidance, so that the body temperature can return to normal as soon as possible.