Hello Rheumatoid arthritis still an important cause of finger stiffness, but it s not always the cause, there are another causes like Dupuytren s Contracture which is the presence of scars in a structure around the muscle and nerves of hand called palmar fascia . The other frequent cause is Trigger Finger which is the blocking of a nodule existing in the tendon of finger against an envelope around that tendon . Returning to Rheumatoid Arthritis , arthritis is a frequent cause but in most of cases the diagnosis in early stage is difficult , usually symptoms appear in same joints in both hands like you have, than same symptoms will appear in a bigger joints like ankle and knees, than there are some other symptoms outside the joints like eye ,skin,heart symptoms . The treatment changes according to the cause . Absolutely you need a thorough examination by an orthopedic specialist to make the right diagnosis and to have the right treatment. Hope I answered your question Wish you a speedy recovery Best regards Dr. Noor Farid