Why does my cheek still hurt?

13 months ago I got out of a domestic violence situation. The day I left is when he punch me in my face. I had a bruise on my cheek bone for about a month. I didn’t get it looked at. Nothing other than my cheek bone bruises. Anyways. Every now and then that area starts to hurt. Throbbing in pain. It’s not bad, but it’s there. Sometimes it’s sensitive to touch. How come this is happening? It’s been well over a year now. I’ve moved on. But this pain keeps bringing me back to the night it happened and I hate thinking about it.

I’m just curious as to why this would still hurt?

Anyone have any opinions?

Thanks!