It's great to hear that you have a handle on things now, and a combination of allergies and DH makes sense. 

It is interesting that ketoconazole seemed to work for dermatitis herpetiformis symptoms, as it seems to be an anti-fungal medication.  If you have DH you will likely also want to avoid iodine, which is common in seafoods and dairy products, as it can exacerbate symptoms in some people. This article may also be helpful as it offers various ways to relieve the itch:  

I looked at the pumpkin seeds on nuts.com and see this warning--so there are many more allergens to worry about!  

Did your rosacea improve when you went gluten-free?

Hello, so back when I was a senior in high school (2020) I had about 8 months where I was completely unable to function, I was vomiting, lost over 20 pounds, had diarrhea and was really sick. This happened after I was hospitalized with cat scratch fever and cytomegalovirus. I have family members on both sides of my family with celiac and they told me my symptoms align really closely with what they experienced. I decided to cut out gluten and go gluten free.  It really helped, I was nearly normal again by 6 months. By the time I could finally see a doctor in person again I was already strictly gluten free for over a year. This doctor ran the blood tests, told me they were negative and that I just have a gluten intolerance. I assumed that was correct and stopped eating like I had an allergy as I assumed it was just an intolerance and that cross contamination would be fine. I would never eat gluten outright but I wasn’t careful at restaurants or even at home. Well now 5 years later and I’m back to being just as sick as I was back then (I’ve had lots of exposures that are my fault as I wasn’t taking it seriously because I didn’t think it was celiac). I was having a really severe reaction so I went to my doctor. I have a new amazing doctor who ran all my labs on Monday. My lipase is elevated, my liver enzymes are through the roof, all of my vitamins and electrolytes are low, and I’ve dropped 10 pounds since my last appointment. My doctor basically said all of this strongly points to a celiac diagnosis, but she doesn’t think it will come up on a blood test as I haven’t eaten anything with gluten directly in years. She told me she doesn’t want to do the gluten challenge (6-8 weeks of eating gluten) because of the signs that is damaging my other organs and she just put it in my chart as a severe gluten allergy. I’m just confirming this means I have celiac correct?    thank you for all your help Nate