Default [Q] HTC One Screen

Hello guys, It may be noobish question but i want some help here. I'm using HTC one , just bought few days ago. but im having some issues with the screen. at some point screen isn't working. means when i touch there sometimes it work but most of the times that area don't sense touch there. but colours and everything is working great. i noticed it when i play fruit ninja. that part of screen dont work. All i wanna know is that this can be possible that screen dnt use touch but show colours and evberything perfectly fine or its bcs of my screen protector i'm using. Thanks