W/ my back problems, why now would i have such worsened pain in my low back? it's burning and i can't tolerate it. to stand n walk is worse.?

See orthopedic Dr.: Hard to say. Could be many causes- herniate disk, pinched nerve, muscular strain, etc. See a Dr. to get answers asap rather than trying to wait it out or doctoring yourself

Several thoughts: There are many causes of back pain. Without a detailed history and exam it's not possible to arrive at a diagnosis. But the burning nature of your pain suggests nerve pain. Most likely cause would be a herniated or bulging disc pressing on a nerve, or arthritis contributing to pressure on a nerve. For an educational video just type in search box: bit.ly/1r1aZ7G For written info: bit.ly/1v1juFX