Hi and Welcome Aikane,
I'm sorry youare having a difficult time. Flares are not a good thing that 's for sure.
I have had RSD for 13 years=full body and have had many flares. A place I go to to check out meds and other medical issues isi www.mayoclinic.com Then it has a medicine section and you just click on N.
My RSD includes my face. I get skin bumps on my scalp, face, outer ears, inner nose I wake up with eye matter, have vision disturbance.
My Dr. generally has the practice of adjusting one med at a time, due to identifying possible reactions. He is a neurologist/psychiatrist/pharmacologist. And most meds he increases/decreases gradually.
It's important to trust your Dr. We are still all different when it comes to reactions to meds. You will get a lot of support here. I'd would encourage you to read a lot of posts here. Also RSDSA on the internet has great information. Also www.rsdrx.com is great place for information. The part of puzzles is a Q&A is very good.
Take care, loretta