Hi, this is a good question and I am happy to answer:
First, hand pain
and inability to perform normal activities of daily living (ADLs) is NOT normal for anyone let alone a 16 yo. Second, this has been going on far too long already. Third, arthritis
while more common in adults is not rare in kids.
I DO recommend you see a pediatrician
and/or a rheumatologist
. Please talk to your parent or guardian.