Why do you Gluten Free?

My mum has coughed for most of her life. Coughed because of anything and everything.....coughed when waking up; coughed after drinking wine; coughed when cooking; coughing, coughing, coughing.....and noone knew (doctors) what was wrong. And when I became a chef and started learning about intollerances and allergies Mum and I thought it might be from gluten. After tests and more tests, Mum was