My son hurt hus thumb playing football he kicked his hand instead of the football, the thumb was fine when he done it yesterday morning, last night he was complaining it was swollen and starting to bruise, no pain, unless I press on it he says its tender, he can move it absolutely fine and he can bend it with any pain, its jjst bruised and swollen, anyone else had anything like this? Is it typically sprained, what can I put on it?