Hello @elisabetha and welcome. The symptomes you describe sund just like what my daughter went through 10 years ago. She was constapated almost from birth and always strained to have a movement. she was 2 1/2 years when she complained of belly pain and her stomach was hard and distended. The ER Doc determined it was "interseseption". This is when the colon turns itself inside out. It was esily treated and she was home playing within hours. I am not a a doctor so I wont diagnose but these symptoms can indicat a number of ailments that affect the bowels. I've never heard of behavior affecting the bowels but I don't rule anything out. With my daughter, she will be on a high fiber diet with fiber supliments and stool softeners for the rest of her life. I would recomend seeking another opinion. As far as the question of Auto-imune bowel problems being hereditary, in my family we have confirmed at least two people in each generation of the maternal side with one inflamitory bowel problem dating back to the early eighteen hundreds. It doesn't prove heredity but it is very sugestive to me. I wish you luck with the little one.