about 3 days ago i noticed a slight tingle and redness in my right middle finger, and since then its got worse. the part around my nail has completely swollen and is really red. its sore to touch i can't put pressure on that part of my finger, i have also noticed little red dots around my hand and up that middle finger. it almost looks like a blister, the skin is stretched and shinny, but i literally have no idea what it could be. the whole tip of my finger is very stiff and hurts to bend, but this has all come on very randomly, any advise would help!