The Camino walk is characterized by a tightening of the legs and upper body in reaction to the pain generated from moving your legs and putting weight on your feet. This cramped gait is the way that you can identify someone in town that has been walking on the Camino.
Several towns have specialists that work for donations and spend several hours each evening treating the results of prolonged walking.
I am becoming somewhat of an expert on blister care myself. First, there are two types of feet. The ones that dry out from the heat which causes cracking and sores and irritated skin. I am from the other camp. My feet sweat so much I have trouble keeping my boots dry.
Dry feet should be covered in Vaseline. This is the opposite for sweaty feet which should be powdered and treated to dry socks at shockingly frequent intervals.
Once a blister has formed it should be drained. Yes, this does increase the chance for infection but until it is drained the pocket of liquid stuck under the skin will move around enlarging the size of the blister.
The draining can be accomplished with a syringe, a needle or a needle and thread. The thread is apparently left in place to allow the blister to keep draining.
Once drained, soaked with iodine and covered with an antibiotic cream on gauze it is then covered with a sticky bandage. This is supposed to allow the blisters to heal. I’ll let you know if that is true in a couple of days.