We recently posted on our Facebook page the Question of What to do to prevent and treat blister on the trail. I have a attached a couple of really good information links that might help you learn different techniques.
We did have a lady Jen Courtney Reply this information if you are on the trail. and what you can do.
This was her response:
I agree with leukotape or moleskin for a hotspot before the blister forms.
But at this stage, (and I know this will be a little controversial), I would wash my foot and poke the tiniest hole in the blister down close to the skin and let it drain. Leave the skin in place. Then I would use something tannic or drying for a soak. Black tea or Epsom salts; plantain or pine needle tea if I have to forage; or calamine or antiperspirant. Let it air overnight. Before hiking the next day, I would cut a piece of moleskin with a hole it it like somebody mentioned above. Don't tape over the damaged skin, just surround it to make a little buffer and keep friction off it. Wea