Calf tingling, like the feeling of pins and needles, the causes are as follows: 1, lumbar disc herniation: when the protruding disc tissue compression to the spinal nerve root, it will cause lower extremity radiating pain, accompanied by numbness of the feet, the pain can be radiated from the buttocks to the back of the thighs, and all the way down to the calves and feet. 2, pyriformis syndrome: pyriformis syndrome is also caused by the compression of the sciatic nerve, only the part of the compression is in the pyriformis muscle below, often with pain in the buttocks and back of the thighs, sometimes accompanied by calf pain. Piriformis syndrome: Piriformis syndrome is also caused by the compression of sciatic nerve, but the compressed part is under the pear-shaped muscle, and the pain in the buttock and the back of the thigh, sometimes accompanied by radiating pain in the calf. 3, lumbar spinal stenosis: lumbar spinal stenosis is often accompanied by intermittent claudication, and the radiating pain in the thigh and the calf will appear when walking a lot.