Our expert says:
It sounds as if you have something we call a ganglion- this is a sac-like swelling containing tissue that lines the tendons or joints. It is totally benign and usually painless, although they can become painful with time.
Sometimes they rupture spontaneously and go away. It can also be removed by means of a needle aspiration and in some cases it can be removed surgically.
It seems as if it is quite bothersome and I suggest you go to your doctor to have it checked out and to also make sure exactly what it is.
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