I have had a couple of these, most recently at the base of my right ring finger, just at the point where if I picked something up the pressure was greatest and the pain worst. My GP advised that the best treatment, unless the thing was really causing problems, was to apply steady pressure for a few minutes a day. Just press reasonably hard on it for ten to fifteen minutes, not quite to the point of pain. After a week or so it would deflate, and eventually go and probably not come back.

He was completely correct. It took about ten days, and I've had no trouble since.

His opinion was that surgical intervention with these things was almost never warranted, and usually too dangerous. If it went wrong the cure caused a lot more problems than the disease.

pca
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Experience is what you get just after it would have helped...