My mom is 60 yrs old and a few months ago she had an muscular joint attack overnight and by morning all her joints became stiff.the docs said it is some form of arthritis and gave her steroids and kept her in the hospital for 4 days until she was able to walk.she was asked to do few exercises everyday After that episode she was fine for a few months and lately for the past 10days the fingers in her hands are becoming stiff on and off and very painful. We are scared if it could be something more serious than we think. She is diabetic too. What tests should she take and which speciality doc should she see. Any suggestions.