Why do I feel that all my muscle is on right side of body only and left is thin, Sometimes I feel right is culprit thinking it's growing more.sometimes I feel left thinking may be it's not growing at all and muscles feel thin. Particularly left abdomen muscle I feel thin and thus I feel left rib muscles also thin. I am so afraid. I feel I will be disabled soon, I have got multiple tests like mri of lumbar, cervical and full spine and brain.blood tests are normal. But I am not getting why my left abdominal muscles are thinned and at that part I also feel lot of gas which only comes out if I bend left, I have tried various gas medicine but it's still the same. I want to add I fell down before two years while playing and then one of my rib muscles got hurt but no fracture, but when I sleep upside down, that rib pokes into the abdominal muscle I mentioned. I guess it's rectus abdomius part.