text: fell about 3 weeks ago, mri showed nothing wrong but still have numbness in chest,back,now gone to leg? fell down steps, got knot on head, skinned knees, numbness on left side of breast around to back after 2 weeks, went to doctor, had mri,exray done, nothing found wrong, now numbness has spread down leg. someone said stress could cause this, which i have alot of stress now from work, what could be causing numbness to spread? i would say maybe you hit a spot on your spine which is causing the numbness. stress could be making your chest numb but i think it's more than that. even though you/ve had an mri and x-rays done...sometimes they can't show the real culprit. i would advise to get some more opinions of other doctors, check medical websites...but definitely don't let this go. it could be serious nerve damage. if you hit certain spots on your spine, nerves that carry impulses to the brain malfunction and can't carry signals as well anymore giving you the feeling of numbness or tingling and can spread down your legs or arms. good luck....keep searching for answers.