I suffered head trauma and now my under eyes are darker - makeup is not hiding it at all. What do I do?

I had hit my head against the corner of a wall 3 weeks ago. As my scar continues to heal, I have noticed that my under eyes have randomly become darker and a shadow is created making it look like I have bags. I feel so depressed because I don’t know how to fix this. Prior to the injury, my under eyes were completely fine - I used to have darkness around my eyes but this was easily concealed with makeup. Please may someone let me know a permanent solution to this.