I see that after updating your iPhone your screen is unresponsive to your touch. I can understand your concern, and I'd be happy to help.
Let's have you take a look at this article with some steps to help resolve this issue:
Get help with the display on your iPhone, iPad, or iPod touch
If after going through these steps the issue still remains, reply back with the answers to the following questions:
1. Are you using the latest version (11.1.1) of iOS 11?
2. Does this only happen when using a certain app or apps?
Thank you for using Apple Support Communities.
Have a great day!