My touch screen freezes then I have turn off my screen to fix.

My display is working perfecly fine just the touch stops working. How I know it? Well I enabled the gesture to drop the notification bar using the fingerprint sensor so when the touch screen is not working I use the finger print sensor to drop down the notification bar the mobile is working ok. Never dropped nor cracked. All genuine. Kindly tell me if its hardware or is it something that can be corrected.