It's not about my profile when ever I use my phone it gets black and

@semiramira let's see what this looks like. Time to disassemble your phone and take a look at where it might be overheating. Post some pictures of that with your Question Adding images to an existing question

This does sound like a broken display. A broken display can generate some heat due to multiple short circuits. I would start by replacing the display. Use this guide for that Samsung Galaxy J6 Display Replacement

The display is available at plenty of online stores. Pick a vendor that appeals to you and make sure that you get a display that fits your exact version.