Numbness and cramps in the extremities may have the following causes: 1. Micronutrient deficiency, if the body has a long-term calcium deficiency, there may be numbness and cramps in the extremities, general weakness, osteoporosis and other symptoms, treatment can be given to calcium tablets for calcium, vitamin D to promote the absorption of calcium ions, if the body is deficient in zinc, there may also be numbness in the extremities, cramps, nail exostosis and other symptoms, treatment can be given to zinc gluconate for zinc. 2. Sciatica, if there is a lumbar disc herniation, it may compress the sciatic nerve, resulting in sciatic nerve pain, causing numbness, cramps, radiating pain and other symptoms in the limbs, treatment can be given to Siwei Pu pain relief, lumbago capsules to relieve pain, Miko Bao nerve nutrition, Chinese herbal compresses, Chinese herbal fumigation and other physical therapy to relieve pain. 3, vascular thrombosis in the limbs, if there is a blood clot in the blood vessels, there may also be numbness, cramps, and symptoms of venous protrusion in the limbs. symptoms of venous protrusion.