A couple of thoughts: My first thought is that this is a thrombosis/blood clot in a digital (finger) vein. It may initially have been painful but after a year, the pain is gone and the blue lump remains. It could also be a discolored ganglion cyst or even a skin tumor including melanoma. You could send us a picture for further help, but your best option would be to have a Dermatologist examine you/it. Good wishes:)
Answered 2/26/2021
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A doctor has provided 1 answer
A doctor has provided 1 answer
5 doctors weighed in across 4 answers
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