Is it normal that i never stop picking at black dots in my skin?

About one year ago, I noticed that there were black dots under my skin, and if I pinched the area, it would come out. The only effect it's had on my skin are occasional scabs that aren't so noticeable that are made when I scratch too hard, though, so others can't really see the problem. I think they're hair roots or something, but ever since, I've spent tons of time picking at those dots, at minimum an hour a day. The longest I've spent is about six hours total, and it's getting really compulsive. Unlike before, I'd freak out if I didn't do it when I wanted, and it makes me feel like there is dirt or spiders under my skin. As a result, I've even started doing it in public when I feel people aren't around. It's really embarrassing, but I know I can't stay calm long without doing it.