My iphone 7 get hot when i play pubg and the battery health is 86 what should i do?

Hi there, shiekh148,

Thanks for dropping by the Apple Support Communities. I understand from your post that while playing PUBG on your iPhone 7, it gets warmer than expected while plugged into a portable power bank. It looks like you want to know if that's OK to do. I'm happy to help!

There are a variety of circumstances when your iPhone may get a bit warmer than average, and playing a game while the phone is charging is one of them. This shouldn't be an issue, but if you have concerns I'd recommend checking out the information and tips in Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures - Apple Support, particularly the "If your device gets too warm" section, which goes over how your iPhone can regulate its temperature automatically when it senses it's too warm.

Cheers!