The causes of low back and leg pain are various. Generally speaking, low back and leg pain caused by parathyroid tumor starts from the lower limbs and gradually develops to the waist, in addition, it is often accompanied by loss of appetite, abdominal pain, constipation, polyuria, polydipsia, mood changes, etc. Some people may also have urinary tract stones. If both of them are high, the possibility of parathyroid tumor is very high, and further ultrasound or CT should be done to clarify. It is necessary to point out that parathyroid tumors are basically curable by surgery, so there is no need to panic in case you have parathyroid tumors.