The causes of daily cramps in the legs of 80-year-olds include calcium deficiency, lumbar spine diseases, and vascular diseases of the lower limbs. 1. Calcium deficiency: Calcium deficiency can cause frequent leg cramps, especially in the elderly often accompanied by osteoporosis, you can supplement calcium supplements, or in the case of the body to tolerate more milk and other foods containing high calcium. 2. Lumbar spine disease: Lumbar disc herniation, lumbar spinal stenosis and other diseases may compress the nerves and cause frequent leg cramps. 3. Lower extremity vascular diseases: diseases such as lower extremity thromboembolic vasculitis can cause poor blood flow in the lower extremities, which may cause leg cramps. Leg cramps in 80-year-olds may also be caused by other reasons, daily leg cramps should go to the hospital in time to identify the cause and under the guidance of the doctor for treatment.