吃饭的时候我不小心咬到嘴角里的肉了，现在每说一句话都要很小心，刷牙的时候就更要小心了，因为牙齿会碰到伤口。 I accidentally bit the inside of my cheek, I am trying to avoid it while speaking now, particularly while brushing my teeth, because my teeth would touch the sores.