Consider the Source of the Criticism

Being able to tell the difference between constructive criticism and destructive criticism can begin by: 

• Doing a self-check-in before responding: If you automatically react defensively, you won’t be able to tell if the comment was destructive or constructive criticism.
• Evaluating the emotional state of the person offering criticism: Those who feel angered, insecure, or jealous are most likely to launch destructive criticism at others in an attempt to satisfy their own sour mood. 
• Considering whether they’re speaking constructively or destructively: Does their comment offer you a way to improve upon the issue they’ve pointed out?