I Have Been Having Some Pain In My Legs Related

I have been having some pain in my legs related to my sciatica if I sit for long periods of time. In the last two weeks I have prickly pain shooting from the sole of my left foot near the heel on the inner side of the foot. The pain is very pronounced when I stretch the calf muscle by pushing the ball of my foot upward? Is there anything that I can do to eliminate this pain? I have taken motrin from time to time but it doesn't alleviate the paid when I do stretching that impacts my foot.