I have cyst or blysters on my pointer finger knuckle on left hand it started with redness and then more and blystes keep coming I have been to dermatologist actually two of them one gave me cream that didi nothing and the other one said it was a mystery he didn t really recommend cutting into them to biopsy them I have had corizone shots in thumb for trigger finger but I had the start of this before being treated for trigger finger I looks terrible not itchy or painfull I don t know what kind of doctor to go to?