I’ve been running about 20-25 miles per week since the beginning of the year. Within the past week or so, however, I’ve started to get blisters. On the TOPS of my toes.

Any ideas why this is happening?

Edit: I’m not a beginner runner. I ran a LOT last year. I also walk quite a bit.

Edit 2: No, I didn’t just get new shoes, nor are my old ones too worn out to continue running in them.