My right ring finger tip has been swelling or feeling tight on and off for a few weeks. The joints of my finger don t hurt. The swelling has caused tiny white marks with no pus, where the fingerprints are. When I got up from my nap, the swelling had gone to the entire finger, joints in finger still do not hurt, although now the wrist joint hurts a little. Not very painful, but worrisome. I have psoriasis under my nails, but it doesn t seem any worse than usual. What causes this and what home remedies are available?