Mental Health PROBLEMS on the other hand are mostly neuroses that go beyond the world of eccentricities, though they can also be much more serious such as Bi polar disorder, schizophrenia etc. They effect you negatively and the people around you negatively as well, and cause you to act in non healthy and non beneficial ways in your life. Many people KNOW at a gut level that their fears or behaviors or feelings are "not right/irrational or causing unneeded stress and heartache", even if only mild. Everybody has bad days but when the behaviors continue for any length of time and are unable to be resolved alone it could be defined as a mental health PROBLEM.