My phone keeps clicking on things that I'm not even clicking on? Sometimes my Sony xperia z5 just start freezing, clicking on apps, turning drawer's pages and doing things like that without me doing anything . In my opinion it looks like a problem with the touchscreen and the display because it's like if someone touches it but nobody is actually doing it, I am also pretty sure that there isn't any virus . Do you have any idea about the causes of this?

Ps: My phone got the latest firmware and not a modified rom
My phone had same issue, this touchscreen issue got me my phone replaced which was under valid warranty.

You should take it to the respective mobile service centre.