Is There A Fee For This? I Have Rheumatoid And

is there a fee for this? I have rheumatoid and osteo arthritis and now some psoriasis, so maybe psoriatic arthritis for more fun! My thumb joint is quite swollen and inflamed and out of alignment. I believe it is the osteo joint at base of thumb. Now it is incredibly itchy too, deep inside. This is going on a few weeks, but is not constant. What is causing this itch?