Cold buttocks may be related to the surrounding temperature is too low, sedentary, lumbar spine disease and other reasons. 1. The surrounding temperature is too low: winter is more likely to appear in the case of cold buttocks, winter temperature is low, even if wearing a thicker, will feel cold, in addition to the cold buttocks, but also cold hands and feet and other phenomena. It is a normal phenomenon, pay attention to heat preservation, add clothes in time. 2. Sedentary: due to sedentary, so that the lumbar, hip muscles and soft tissues of excessive tension and fatigue, produce excessive inflammatory and acidic metabolites and accumulation, stimulate the peripheral circulation and vascular constriction, resulting in slower blood circulation, blood supply is insufficient, so that the local temperature of the skin drops and leads to the feeling of cold buttocks. It is recommended to be more active, avoid sitting for a long time, and promote blood circulation. 3. Lumbar spine diseases: such as spinal stenosis, lumbar spine ou protrusion, spinal tumor, etc., compression of lumbar spine parts of the nerve root, affecting the blood circulation of the lower limbs, can appear buttocks cold feeling, but also accompanied by pain in the lower limbs, numbness, lumbar activity limitation and other symptoms. There are many other causes of cold buttocks, it is recommended to consult a doctor in time, after clarifying the cause of the disease for targeted treatment.