If you still have warranty, they should repair or replace it, probably.
If you're out of warranty, but your phone still functions correctly, apart from this issue, it might be a good move to do nothing.
If you're out of warranty and your phone does malfunction in such a way that it's more or less unusable, it's time to buy a new one.
Why does my phone screen always become yellow? Especially when it is charging, the screen will turn yellow with two words on it: Emergency Mode. Have you met such a problem? I have been to the repair center twice. But they can't find out the problem. I don't want to go there anymore unless they change a new one for me. Anyone who knows, please help. Thanks a lot!