Aqualyx and Rheumatoid arthritis. Can I have this treatment?

I’m not a big fan of fat dissolving injections as a way of removing subcutaneous fat. Procedure is inferior to liposuction by pretty much every standard.
I suggest you talk to your rheumatologist and then talk to providers who offer the treatments you’re interested in and make sure everybody’s on board.
Each provider will have their own views on what they feel comfortable with so you’ll have to find out by asking each one first hand.
I suggest you consider in person consultations with local board-certified plastic surgeons and see what they recommend.
Best,
Mats Hagstrom MD