When i go out i cannot look out other people faces since it scares me. what can be the problem.?

Phobias: This is a kind of social phobia that might reflect some internal conflict and sufferences that are not resolved. Recommend assessment by a psychiatrist and a psycologist.

Therapy: You need to see a therapist/counselor. This is a phobia and needs to be addressed with cognitive behavior therapy and exposure (i.e., forcing yourself to look at people's faces even briefly to overcome your fear).

Scopophobia: You may have a scopophobia or fear of seeing strange faces or other simar phobia. You should seek the help of a psychologist or psychiatrist to help you with this. Apt can be achieved henry therapy to help you identify your fears and develop effective coping mechanisms.