I have been driven crazy with trying to figure out what is causing these tiny, tapioca - like blisters on my fingers. They come in clusters and sometimes in singles, but much larger - about the size of the head of a straight pin. Sometimes they form a bump on my skin, sometimes the surface is flush, but the blister goes deep - then it's painful.
I had some appear under the nail of my index finger. I was given some vaseline-based ointment to put on it. It seemed to work pretty well. Most of the symptoms went away in about a week. But my nail started to come away from the skin. It got really distorted and started catching on everything. I keep it trimmed back and filed and it seems to be better. It's growing out now and looks okay.
The blisters came back and the ointment had little or no effect. I went to a dermatologist - he prescribed a cortical steroid called Mylan-Clobetasol Ointment. This was so powerful that it made my blood pressure go up and I started to gain weight. And now, even it seems to have no effect on the blisters.
I'm worried that I may get more under other nails on my right hand - if so, I can just forget about playing the guitar ever again!
I'm going to try the Bert's Bees products. I have some lip balm and I really like it. I suspect I'll have some better results. I'm also going to start taking some vitamin C.