I read your story and while most of us only suffer on the face, scalp and around the ears... I have had the outbreaks on tattooed areas of other parts of my body. It has only been on the tattooed areas though, and mostly during the time when the tattoos were fresh.
We've all done our own research and come to our own conclusions about this stuff. I don't know that yours is the same, but it's closely-enough related that you can maybe draw some help from us. It took me a long time before I understood what the ooze was. It's basically your body squirting lymphatic fluid onto your skin in order to heal something that's registering as damage or as an allergen. So the trick is to stop that process. For many of us, who have been battling this for decades- Soolantra is the answer. Soolantra, however, is very expensive... and will be more expensive for you if you have to go rubbing it all over your back and other areas.
So, forget Soolantra for now. Let's boil it down to the possibility that your body is producing too much oil and may be luring demodex mites to feast on it like a bunch of Las Vegas tourists. If you want to beat this thing and get your life back, you may have to radically change the way you eat. I don't know your current eating habits, but it helped me a lot to strip my diet down to almost nothing. For a while, I had to eat nothing but rice, vegetables and chicken that I steamed. Only drank water. Then one by one, you can add things back in and see how your body reacts. Our bodies do not always make sense. Apparently my body reacts to tomatoes and citrus. Even though I can't handle eating lemon without getting a break-out, I can eat grapefruits all day. So sometimes they answers you find betray all reasoning. I also have a terrible time with avocados. You'll find diets all over the place online that tell you to 'cleanse' using lemons and avocado and stuff like that, but it has the opposite effect on someone like me. A lot of people radically change their conditions just by cutting out dairy, which I did almost a decade ago.
Because you mentioned the drying out, research a condition called 'sjogren's syndrome.' In short, it is an oil gland disfunction. There's no way to fix it, but you can alleviate symptoms by refraining from tea, coffee, etc. Even the most mild tea, you have to remember, is dehydrating. Coffee is especially dehydrating. Alcohol and other things, too.
I don't know what's triggering your symptoms or what things will help you, but if you want to win you have to hit at it from a lot of different angles. You have to be patient and persistent with trying things that seem counter-intuitive. No doctor is going to do a damn thing for you other than label you with mrsa or something and tell you to swim around in hibiclense. Even a naturopath is just going to sell you different types of 'cleanses.' You can find a way out on your own through trial and error and with communicating with people like us. Wish you the best of luck.