I was diagnosed with contact dermatitis, rosacea, and seborrheic dermatitis in 2010. I also have fibromyalgia and Lyme disease. I am allergic to nickel; gold; propolis (from a raw honey face mask used to fight seborrheic dermatitis -- be careful when someone tells you raw honey has great antiseptic and antifungal properties); cinnamic aldehyde (found in mouthwashes,cinnamon oil, cassia oil, and Balsam of Peru,which is found in many other products); methyldibromoglutarinitrile/phenoxyethanol, diazolidinyl urea (the last two release formaldehyde), and methyl methacrylate and 4-tolyl diethanolamine (the last two are dental products). Although I avoid all these products, I am still constantly itchy and take antihistamines and quercetin every day. I had a regular patch test and a dental-materials patch tests. One of the things I am grateful for is that my dermatologist tests separately for methyldibromoglutaronitrile/phenoxyethanol and phenoxyethanol by itself. The compound form causes many more allergies than phenoxyethanol by itself. It turned out I wasn't allergic to phenoxyethanol by itself, which is great because it is in a TON of products! I still try to avoid it though. I am not allergic to propylene glycol (yet -- these allergies seem to keep developing), but I try to avoid it whenever possible. I also stay away from anything with essential oils and I eat a very bland, low-histamine diet. Boring but I get fewer rashes that way.
That's the same year I got my diagnosis! While I'm sorry to hear about all of your allergies (it must be really hard to find products you can use), I AM glad that you found a doctor who works with you on this. A lot of doctors don't know what to do with patients like us! It sounds like you deal with a whole host of problems overall :-( I hope it all disappears one day. It can happen. We can only hope, right? And in the meantime, all we can do is adjust.
Thank you much for sharing your story!