Be sure it's coming from your back, I suffered for years,couldn't stand for any length of time till sciatica would shoot down my leg and if I stood on for a while the leg would go numb. Always blamed my back and was told I had arthritis in my lower spine. I had to take a shooting stick if I was going anywhere I couldn't get a seat. Eventually my hip gave up and I had a replacement in March, now I can walk about or stand about all day if I have to, and haven't had the pain since. Get your hips checked out, they are replaceable your spine isn't.