If the body always feels cold, it is caused by the following factors: from the perspective of Chinese medicine, this is a deficiency of the body constitution, due to kidney deficiency, spleen deficiency, Qi deficiency and blood deficiency, it will feel cold all over the body often. The most common factor is endocrine hypofunction, such as hypothyroidism and adrenal cortical insufficiency, which can cause coldness. Feeling cold all the time is also related to some infections. When viral or bacterial infections occur in the body, the body will feel cold, which is a precursor or prodrome of fever. In some cases where the immune system is extremely low, such as severe anemia, tumors, tuberculosis, and AIDS, the body may also feel cold all the time.