I used to have back pains a year back. I consulted a doctor & upon viewing x-ray of my back, he diagnosed it as Lumbar Lordosis. He suggested I take up physio therapy. But since I started physio therapy, I feel pain (tingling/numbing sensation) from left buttocks up to the foot. I have been told that this is due to pinched sciatic nerve by a general physician. Is this treatable/ curable ?