Hi my daughter is 10years old and has suffered with constipation since birth she may pass a stool 7-10 days. When she does go they are very large - lately she has become pale and dark under her eyes, she says she feels tired at times. In my family there is a history of bowel cancer both my mum aged 31 and gran aged 47 died from this. In my husband s family there is colitis . I am now starting to worry.