Painful leg cramps are generally most likely to be caused by conditions such as calcium deficiency, osteoporosis, and vascular disease of the lower extremities. Leg cramps are generally common in the elderly, who, for physiologic reasons, will gradually develop a calcium deficiency as they age. When the calcium in the blood is too low, it will lead to spasms in the muscles of the lower limbs, and the forced contraction of the muscles will produce cramps and leg pain. When this happens, you should go to the hospital as soon as possible to have your blood calcium checked. When calcium deficiency gradually develops, osteoporosis will occur, when excessive exercise or labor and cold will lead to muscle spasms, muscle cramps leg pain phenomenon. At this time, it is necessary to go to the hospital to check the bone density, a clear diagnosis, and anti-osteoporosis treatment. In addition, elderly patients with vascular sclerosis or blood flow changes, resulting in lower extremity vasculopathy, lower extremity vascular stenosis or lower extremity muscle tissue blood supply is not good, will also cause muscle ischemia and cramps. If this situation occurs, it is recommended to find a vascular doctor for detailed diagnosis and treatment and symptomatic drug treatment.