What causes sudden spasm in mid back and stomach area under bra line?
Patient: i have had two occurrences this week with what feels like a sudden muscle spasm in my mid back....under the bra line. It stays for about 5 minutes then goes away. The last one however was accompanied with a spasm in my mid stomach area on the right side directly under my bra line. Doctor: Hi there.This could be due to a pinched nerve at the back or due to bad posture at work or sleep. I advise you to follow ergonomics, apply hot water bottle to that painful area, take pain killer and muscle relaxant.