How do I know you are a REAL doctor online, cause I can t waste time? Male, 42, been fine, relaxing the last 2 days. Then all of the sudden severe mid back pain on left side right at bottom of rib cage? I believe I know but would like another opinion. Not running fever. Skin looks and feels OK. Help Going to hospital not an option unless he feels its time. Thank Wait. I have to pay for advice? Getting as bad as lawyers, if I could pay I would be at HOSPITAL!!!!