I have a very hard, painless knot on the base of my thumb where it meets my palm. It is about the size of a pea and it has gotten bigger since I first noticed it about 5 months ago. You can actually see it pushing out against the skin. Just wondering if it is anything to be concerned about.
Welcome to Chat Doctor .1. There is no remedy for this kind of lesions other than small incision and Chat Doctor.  If the lesion causing discomfort or pressure effect.2. The history suggest - it's a ganglion cyst, pain less hard slow growing from the joint area.3. Other possible cause could be lipoma (fat cells) lesion.4.It's not an emergency or concerned issue - but if you have any discomfort see your doctor and get needful treatment done.5.MRI is good investigation for this - but depend on if It's easy to get it done in this small issue (as it is helpful aim informing - joint tendon, nerve better assessed in MRI) Good luck. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you.