Mental health refers to your state of mind and how it affects your thoughts, feelings and behavior. Life events impact your mental health in positive or negative ways. Stress, fear or grief affect your mental health and can make you look at yourself and others differently. For example, if someone breaks into your house, fear can make you view strangers and even people you know suspiciously.
However, experiencing bad mental health doesn’t mean you have a mental illness. A mental illness is a condition that alters how you think, feel and behave. Professionals diagnose a mental illness based on its impact on your life. People with mental illnesses often experience problems fulfilling their personal, relationship and professional responsibilities.