What sort of digestive ailment did my ex-boss have?

I used to work for a woman who had a severe digestive ailment, but she avoided naming it to me for whatever reason. I think she was tired of having to discuss it with everyone.

Here were her symptoms: she could eat only poultry or fish, “white” carbs (like rice or white bread), and milk products. She could eat absolutely nothing else, or she would develop horrific abdominal or intestinal pain and cramping. While I knew her, she was hospitalized once or twice for it.

I’ve always wondered what it was she had. Does anyone know?

There are a lot of things it could be. Like Crohn’s disease, inflammatory bowel disease or ulcerative colitis.