I am running my first half in December. A few weeks ago, I was fitted for a new pair of running shoes. I'd been running fine in them, but this week, my right foot is giving me issues. I got a massive blister on the side of my right toe, and now the 4th toe hurts like there is a blister on the tip of it (but I don't see one) whenever I run.
I don't think its my socks because I've been wearing the same kind for months. It just started this week. Is it the shoes? I may be within my 30 day return window, need to check my bank statement.
Have you added distance? Lacing them more tightly? Has it been warmer than when you first started? Sometimes even a little foot swelling can affect how they fit.