Cold sweating in bed at night is usually called night sweating, which is theoretically classified as qi deficiency, yin deficiency, or liver fire. Generally, after the Qi deficiency, the body can not fix the fluid, and Yin deficiency and fire can force the fluid to leak out, which is manifested as sweating. From the perspective of Western medicine, a variety of diseases may appear the phenomenon of night sweats, as follows: first, endocrine diseases, including hyperthyroidism, and female menopause syndrome. Second, infectious diseases are mainly tuberculosis, chronic liver disease, AIDS, osteomyelitis, abscesses and so on. Third, autoimmune diseases, such as lupus erythematosus, rheumatoid arthritis, ulcerative colitis, etc., will also have night sweats. Fourth, then there are neuropsychiatric disorders, including cerebrovascular disease, anxiety, hyperhidrosis and so on. Fifth, there are malignant tumors, including lymphoma, leukemia, pheochromocytoma, etc., which may cause night sweats. Sixth, there may be drugs, such as hormones, antidepressants, etc., may cause night sweats.