Theoretically this will occur when the digitizer is getting apart from the screen. As you may know, the screen we see it's composed from several layers glued together. The digitizer is the last layer, the one we touch and transmit our touches to the OS. This is also the part that usually gets broken (if the shock wasn't too big ofc to break the actual LCD screen).
You could go to a service, they are used to replace such parts and they could glue it back. It might be possible that your device had the digitizer replaced in the past and it was not properly glued as it have been initially in the manufacturing plant and that's why you have the issue
Don't force it
...use a bigger hammer!
HTC One S - AOSPA Legacy 4+ / CandyKat
HTC Desire S - IceColdSandwich
HTC Legend - CyanogenMod V7.1.0 (sold)