I dropped my iPhone and now its emitting a faint black light

My iPhone fell out of my pocket while I was running. It looked fine, but later in the day I went to use it, but it emitted a faint black glow and there were a few white vertical lines on the right side. I've tried a hard reset, but when I did the white lines disappeared as well as the black glow. I want to see if I can fix it on my own before my parents find out. Anything I can do?