Help for persistant Diahrrea

My friend who is at least 50% raw has persistant Diahrrea.
She is stressed usually, so I think that that contributes, but she has had this problem for about 3 months. She has tried IBS diets etc, but nothing works for her. She is finally "giving up" and going to the doctor to get some "help" - but she thinks that they'll do nothing but tell her to go get some immodium.
What can she do?
- She also has had some weird breakouts on her hand, which she originally though was shingles or a wart, but it spread a little bit.
- She ALSO has UTI issues right now.

I don't know what to tell her....anyone have any suggestions?
I'll mention that she is Vegan, too. And saying that she's 50% raw is an understatement - she eats a cooked meal MAYBE once a day.

could it be parasites?

Has she done a specific parasite cleanse in all the things she has tried? I don't know much about them but I'm sure others on here have lots of info.

That's what I thought of this morning :(
In fact, when she called her doctor her doctor asked her if she had eaten any foreign produce from her recent vacations - the truth is, she doesn't know....but I told her that parasites could be in anything, whether it's from mexico or not :-\