How do you know if you have one?
How do they diagnose?
My GF used to work at a sushi place, and has had "stomach problems" for a long time since then, and lost a bunch of weight, unexplainably...the DR. said she had a food allergy, but never did a blood test...asked her to keep a food diary, but that didn't do anything.
She's been suspecting a stomach parasite for awhile, and I always brush it off, but man, what if, right?
How do they diagnose/fix?
Thanks