The common causes of cramping symptoms when the foot is straightened with force are as follows: 1, calcium deficiency or osteoporosis: most occur in elderly patients, with age, blood calcium levels tend to fluctuate, leading to hypocalcemia and also serious osteoporosis. Patients will be prone to leg cramps when the foot is stretched out with force, accompanied by leg pain and limited activity, and laboratory tests of serum calcium ions will reveal a significant decrease, while bone density tests will lead to a decrease in bone density; 2, leg muscle cold or strain: patients are prone to cramps when the foot is stretched out with force, patients usually have a clear history of cold or strain, early diagnosis and early treatment can lead to rapid clinical symptoms Early diagnosis and treatment can lead to rapid relief of clinical symptoms. If the cause of the disease is not corrected in time, the cramps when the foot is stretched out will occur repeatedly, affecting the patient’s normal life, and even unable to exercise.