I do is a problem I've had for years, and sometimes I can control it for a few weeks but if an exam is coming... then I start again anyone else have this problem?
Yep. It got to a point where I just chewed them down so badly that they looked awful, and then I just bit them so that they looked neat, and they're just barely there anymore.
Not really, and for a couple of reasons. First, it's disgusting and under your nails has so much bacteria it's insane. And second because I obsessively clip my nails so there's not really that much there to bite in the first place.
I used to as a kid but I grew out of it. Sometimes if there's loose skin or something near my nails I'll chew it off but I don't chew my nails. They end up looking gross.