Lots of good advice on treating a blister here.

I had a foot problem a couple of weeks ago. I was on a field training exercise wearing well broken-in boots and fresh wool socks, my normal stuff. It was a hot day and shortly after I started hiking my feet started to heat-up, especially the back of my heels. I was not in a position to stop, so I just pushed through and dealt with the problem the first chance I got in the late afternoon. I expected my heels to be a mess but they were only red and tender, as was my entire foot? I applied some moleskin to my heels and changed my socks, problem solved. I think that I had a reaction to whatever detergent the socks were washed in, because I was on the course for 8 days and this was the only time I had difficulty with my feet?

Mike