Why do my fingers feel... weird after playing on computer for a long period of time? (2-4 hours. getting up at rare times)?

First off, Yes i have looked up to find an answer but i guess im either missing keywords or there is none. When ever i play on my computer its for games or file sorting but mostly games. I would play for hours until i went to sleep or had to do other things. Now when i would normally open my hands/bend my fingers. They would feel normal like they should but after playing for so long then doing the same opening and closing motions they seem to feel weird where they bend. Almost like they are snapping quickly open or close... Am i damaging my bones somehow?