I have used things to nourish my skin after an episode of abuse, and that is typically what have caused mine. So pure shea butter or coconut oil are very good to sooth angry bumps. Most of the time I ad that as a pre bed application when I have had too.
As for the causes, in my case too high and angle, too much pressure, and overshaving. The overshaving came after the other two. Too many passes basically, and it makes my skin feel and look just like too much pressure. My neck is fairly sensitive and most of the time I am limited to two passes. The direction is not nearly as import an as the number. So I go one against followed by one mostly across but a little with.