Fight with others, smashed people head a few times with the hand, joint of little finger extreme greatened, ache a bit a little, but can activity, joint is excuse me amiss, what circumstance be?

• 跟别人打架，用手捣了别人头部几下，小拇指末端关节变大了，稍微有点疼，但是可以活动，请问关节有毛病吗，是什么情况？