well could be a few things but is it painful? What
side of the ribs are hurting? Both?
Left side would be possible spleen...right
side would be gallbladder..spleen would be sensitive to the touch and usually a ct scan/xray would be used to diagnose that. Could be trapped gas, so maybe buy some gas x and give that a shot..had a member here a while ago went to the doctor thinking she had some spleen issue and it turned out to be gas trapped on her left side (it happens).