Blisters that appear to be caused without heat, how to treat?

[RustyPelican]

for years..
I have had these blisters for more than 30 years. I have had countless doctors prescribe so many drugs and too many creams. I have given up on any professional who has a degree. Because in my reality they do not have a ******* clue what it is.

I worked as Plumber in Arizona for several decades . I first noticed these blisters there, they would appear as small 1/8th head size, if not lanced open they would hurt. They only appear on the bottoms, sides and heel area. I now live in Oregon. I dont work, I seldom go anywhere because of a fall injury removed my ability to walk. However the blisters still appear. It doesn't matter if its frigid outside or 115 degrees. It doesn't matter if its low humility or high. What did help keep them at bay was a drug called "quinine" the FDA took it off the market 2-3 years ago, I had stockpiled 2.5k units but I have run out of them. I have been treating them by removing the blister head and draining the cavity of liquid. I then fill the cavity with alcohol or Iodine. I think this is not a fungus as it appears from the inside out, so it cant be treated by applying a cream. I need a treatment that would be taken internally that would target would be subdermal area's.. maybe a patch that could carry the drug through the skin to the effected area.

I have so many of these things appearing and no one knows what it is or how to treat it. can anyone advise. I can submit photos.