My Iphone keeps shutting off, but before it shuts off, my screen freezes and there's these lines that show up, they're random?

My Iphone keeps shutting off, but before it shuts off, my screen freezes and there's these lines that show up, they're random. Sometimes there's this crackling sound, and sometimes the line move, my mom says its just the phone, but my dad says, its the proccecor and that its overheated, i have an Iphone SE rose gold 64 gb and my iOS is 12.3.1

12 Warning Signs That You Need to Replace Your Smartphone

The screen shows vertical lines or other anomalies…
The touchscreen gets extremely slow…
The power button stops working…
The device repeatedly shuts down and reboots itself…
Apps constantly crash, or the operating system seems unstable…
The phone overheats, even when you aren't using it…
The battery is bulging.

I would take it to a phone place and ask thern to fix it

Take it to an Apple store.

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