Subject: Re: lump on my thumb
Sounds like a nodule caused by OA. I have them on a few knuckles and they are very painfull. I have had mine diagnosed. My middle finger won't make a fist shape anymore the knuckle is so big in comparison to the others. I am the same always hurting then really painful at times.
lol if you are concerned it is best to get it checked out to be sure.
Wishing you a Happy and Healthy New Year.x