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. Wear thick, clean socks. Wear a different pair of shoes if possible or if you have to wear the same ones, change the lacing to slightly change the pressure points.
If it gets to the point of the skin peeling off or bleeding, You got a whole another problem. Clean, provide wound care, and rest for as long as possible. When you have to hike again, create a moleskin circle around it, cover the raw skin with a colloidal Band-Aid or Band-Aid or gauze cut to fit inside the circle, the cap the whole thing with another layer of moleskin. As soon as you're done hiking, remove the cap layer of tape, leave the circle and change the dressing if needed.