I've had back pain for the past week. It hurts to stand and even if I'm lying down it stays painful. What could be causing this?
There's no telling without seeing a doctor what this is as many different things can cause low back pain. You can find some home-care tips about dealing with low back pain here. Most cases of low back pain do resolve themselves over time.
If it doesn't resolve soon or if it's very severe be sure to see a doctor who can diagnose the problem and give you more options such as muscle relaxants that should help.
Low back pain may be the most common kind of pain experienced. Hopefully yours will resolve soon. :)