Is any joint involved in the arm or in other part of the body?
Is there any increase of swelling in the morning?
What is the blood pressure in the arm?
Since how long getting this swelling?
He may be investigated .
Following investigations are advised.
Blood examination-- Complete blood counts, Rheumatoid factor, E.S.R.
X-Ray examination - X ray hand & cervical spine
Meanwhile He can be given Tylenol 1SOS.