I wear a finger ring but when i remove it, i cannot seem to straighten the ringfinger like a cramped finger, what to do?

A ring can irritate: Tendons especially if there is a problem know as trigger finger where the finger catches and locks due to swelling. It may be a coincidence or the ring may be in part contibuting to this issue. Try leaving the ring off for a few days and if the problem resolves. See a jewler to get the ring resized, not your doctor. If not/ see your medical provider, trigger digits often improve with injection.