iPhone dropped and now it has a green thin light, How to fix it?

Hello so I dropped my iPhone when I was getting inside my car and when I dropped my phone I kinda closed the door so now I have a bright light with a green thin light in it. I tried to take a screenshot of the light but it won’t show.

Can someone please tell me if I need to get my screen and back of my iPhone fixed.

[Re-Titled by Moderator]