Most Helpful Girl
If you're covering yourself up for modesty reasons that's good. If you're covering yourself up due to your own insecurities that's bad. You need to learn to love yourself because the problem isn't found in your clothes, the problem is your poor self image.
Most Helpful Guy
I'm not sure what exactly you mean by hiding your body, but in general I'd say yes it is bad. People can see from a distance that you are hiding your body and will assume you aren't confident about your looks which makes you appear much less attractive. I had a friend once who wouldn't take off his clothes at the beach, it was really weird.