do i have to go in to get this fix? or can i do this at home. will there be an update coming out to fix this issue ?

In depends on what the issue may be.

If an iOS update as suggested won't fix it, and Its a hardware issue as explained in the support document you posted from. Yes, you would need to take the iPhone into an Apple Store or authorized service provider to get it looked at.

It's unlikely a hardware problem would get corrected with a software update.

click here ➡️ Take your device to an Apple Store or Apple Authorized Service Provider, or contact Apple Support about your iPhone

If you are referring to a Face ID issue, then no, there is nothing you can do at home to fix it. You will need for Apple to assist you with this. You can start that process by using the "Support" link in the bottom left-hand side of this forum's web page.