HI, I have had this lump on my index finger for a while now, I would say maybe 2-3 months roughly? It is on my left hand,located exactly on the second joint (the biggest one) and it doesn't really hurt unless i bend my finger, but the pain is not severe at all. However, it hurts if i try to rub it. The lump kinda sticks out a bit when i bend my finger. So i wonder what this is, arthritis, infection, or even cancer? I am only 19 so i dont think it would be arthritis though. Please help me ! Thank you !