Our expert says:
a tingling sensation is usually caused by nerve irritation. You may have a pinched nerve in your lower back or you may have a problem with blood flow in the legs due to a narrowing or blockage of arteries. One can easily determine the cause by doing a sonar of the calves when this happens and/or doing a lower back xRay and physical examination ( testing pulses, looking for signs of nervecompression)
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