Well the reason most boys get hernias is because when the testicles descend into the scrotum from the abdamon they have to pass through the muscle wall in the pelvis. This leaves a small hole in the muscle, which the intestines typically slip through. That is what causes the pain beause the intestines can be somewhat restricted and can become strangulated. Further, in Mason, it caused constipation.
We noticed his hernia on the right side because he suddenly had a lump where he shouldn't have had one (it looked like a 3rd testicle almost). When they fixed that one they also explored the left side and found a small hernia there that was also fixed.
Hernia's are far more common in boys then in girls and far more common in preemies then full term babies. The stomach hernia should't cause her any discomfert, but if she is having loud and explosive BM's, its quite possible that they do hurt when she goes. The area may be tender too. Have you looked to see if its red or irritated looking?
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Missouri State Coordinator
Mommy to Alex (4)and Mason (1 1/2)
Law Student - 1 year done, 2 to go