Why is my middle finger swollen?

Using this site. To get the most from this site you need to provide adequate background information before asking a question. Things like when this started. known triggering events, what efforts to treat & effect, etc. all matter & allow for a reasoned response. As posted your question cannot be answered. You are welcome to start over. Posts are not linked so each must be complete.
Agree with Dr. K. If it is not red, and not painful, try to keep you hand elevated, even at night and see if that helps. It is not feasible to provide a meaningful opinion without additional history, physical examination and may be some tests.
Need moreinfo. Trauma,overuse,jammed,infection,arthritis,etc.Not alot of info given,repost with more info.