i also have issues with my fingers and wrists..my fingers seem to lock up, swell and are painful it only happens with one or two at a time on the fingers for no real reason at all..my wrists get painful and my toes have always been numbish or painful...had none of this before covid, long covid is three and a half yrs now for me , i have a lot of different symptoms that come and go when ever it wants, i never know day to day what it will be...just have to keep working at it.....