What can it mean if I have purple fingers and joint pain?

Purple. Could be spasm of the blood vessels in the fingers ie raynaud's syndrom, which can present with arthritis, ie rheumatoid arthritis, lupus, scleroderma, other connective tissue diseases. Important to make sure it is real and not due to chemical staining, raynaud's is treatable. Meds or moving to a warm climate, if cold intolerant. Rare diseases ie cryoglobulins, vasculitis can occur and need mdexam.