Wake up in the morning body temperature is only 35.5 ℃, if you get up to carry out appropriate activities, the body temperature rises to 36 ~ 37.2 ℃, and the body does not have any uncomfortable symptoms, then it is normal, if the body temperature continues to not be able to rebound, then we should consider that it is caused by certain diseases. Human body temperature in the day will have certain fluctuations, usually lower in the morning, the afternoon body temperature will rise, the human body temperature is generally in the range of 36 ~ 37.2 ℃ changes, if by chance once in the morning measured temperature of 35.5 ℃, after appropriate activities, the body temperature can be rebounded to 36 ~ 37.2 ℃, then it is normal. If the body temperature is only 35.5 ℃, and after certain activities can not rise to the normal range, then we need to consider the possibility of hypothyroidism, malnutrition, malignant disease and other diseases, which may lead to the human body to appear the manifestation of low body temperature. If the symptoms of a body temperature of only 35.5 ℃ persist without relief, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it.