Older people are afraid of cold to a certain extent and iron deficiency, iron deficiency peripheral tissue oxygen supply is reduced, resulting in tissue energy metabolism is impaired, will be due to the lack of heat production, the body feels unusually cold, at this time should encourage the elderly in the winter in moderation to eat more iron-rich foods, such as black fungus. Elderly people often have postural hypotension, low blood pressure can cause poor peripheral blood circulation, the limbs do not get enough oxygen and energy, easy to be afraid of cold, so we need to regularly review the blood pressure, to avoid blood pressure is too low. Elderly people often combined with hypothyroidism, menopause, estrogen level reduction and other diseases, can cause cold hands, feet or the whole body, should also be concerned and treatment. In addition, infectious diseases can appear chills, accompanied by chills, chills, high fever, it is recommended to check the blood routine to see whether the white blood cells are high or not, and then do a chest CT and abdominal ultrasound, urine routine to look for infected primary foci, timely medical treatment!