im 17 and have really bad bowel pains and sometimes its like a knife stabbing it and i cant walk i just have to deal with the pain.. other times its just undescribable a constant pain feeling and it doesnt stop until i take a sh*t.. sometimes i get diharea out of it, sometimes normal stool sometimes both one after the other.. i took blood test and had my stool examined doctor said everything is normal, i also had a scan of my stomach and nothing was wrong, could this be the food i eat? I eat alot of junk food and not many fruit/vegetables but my BMI is still normal cuz of sports and other activities i guess.. is there any solution to this problem