The tip of my wedding ring finger, all around the nail has become inflamed ,very swollen and is very painful. I don't recall actually doing anything to it. Yesterday a lot of pus came out of it and it has gone down slightly but is still very red and sore.
Any ideas what has happened?

sounds like paronychia

Thank Sid, that sounds exactly like what I have got.
I can't believe how sore and tender it is. I will try and treat it as it suggests on the website.
Thanks again