Have you experimented with any Pro-biotic supplement yet?
Also, with chronic diarrhea, do you supplement electrolytes?
I share a few of your symptoms
-Rash on my face
I just found out today I am allergic to chicken and mustard. I had NO idea I had these allergies until now. This is one of the reasons to get a allergy test.
Most people with Candida overgrowth have Leaky gut, so chances are you have a few food allergies/sensitivities.
The rash on my face would show up when I eat a lot of the same foods (Lemons, chicken, limes, maybe more).
I recently found a pro-biotic soup that great (Called “candida freedom”) this literally cleared up my 2 week long rash in 2-3 days. It has lemongrass (Anti-fungal) and pro-biotic in the soap. maybe worth a try on your legs to see if its fungal related.