As might says – and as you probalby know – the sciatic nerve is being squashed by something in your spine and it is causing it to feel pain. I get sciatica from scar tissue in my hamstring which is mostly just pins and needles but shooting pains as well sometimes. I have had acupuncture for it (which helped and aslo cleared up my hayfever!) and most latterly sports massage, which is £40 a pop but has helped a lot. It may be worth speaking to a physio or massage person, they will tell you if they feel they cannot treat without a doctors say so.