Today Morning, I observed many purple spots over my m30sphone screen. Don't know what is the reason. Called customer care services also but didn't get proper response about this problem. Can you please help me to resolve this issue.

Today Morning, I observed many purple spots over my m30s phone screen. Don't know what is the reason. Called customer care services also but didn't get proper response about this problem. Can you please help me to resolve thisissue