Make sure your head is turned as far toward the target as you can turn it. A lot of times guys will hit their faces with a brass nock, and sometimes changing to a tied-on nock helps. However, a brass nock usually leaves a cut rather than something like wind burn. Some people will hit their faces when they shoot with a tab but not with a glove. You’re more likely to hit your face when you shoot with a loose fitting glove; get one that’s snug. Get close to the target and experiment with holding the string away from your face so that it doesn’t hit your face, and slowly move it in until you notice it brushing your face, then back off a little.
It’s good to have a tight anchor against your face, but it’s better to have an anchor that barely touches your face than have the string hit it. If the string hits your face enough times it will become sensitive and you might start flinching, which will ruin the shot. You need to keep your head totally still when you release the shot.
If you’re inexperienced, you may not be holding or releasing the string properly, and after you learn to do that, you may be able to tighten up your anchor again, so keep trying.