Cold on both sides of the hip bone refers to the low temperature of the skin on the outside of the waist and buttocks, the common causes are cold, sedentary, anemia, etc.. 1. Cold: because of the temperature drop do not pay attention to keep warm, feel the wind cold caused by the blood vessels around the outer hip contraction, blood circulation slows down, metabolism decreases, less heat production, can cause the skin temperature is low, is a normal phenomenon. 2. Sedentary: If you sit for a long time at work, study, due to lack of activity, the waist and hip muscles are overly tense, metabolic products accumulate, stimulate local vasoconstriction, resulting in slower blood circulation, there will also be a low temperature of the waist and hip outside the skin. 3. Anemia: due to post-traumatic hemorrhage, long-term chronic consumption or bone marrow hematopoietic dysfunction, resulting in anemia, hemoglobin oxygen-carrying capacity decreases, insufficient perfusion of tissues, there will also be symptoms of cold body, mostly accompanied by pallor, fatigue and other symptoms. Causes of low skin temperature of the outer part of the waist and buttocks are more reasons, may also be related to mental tension, lumbar disc herniation, hypoglycemia and abscess formation and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in time, to clarify the cause of the disease, and to carry out targeted treatment.