What's the difference between mental unhealthy and abnormal?

Strictly speaking, neither is a very strict concept. If we want to compare, mental health is a big concept, including general mental health problems, serious mental health problems, neurosis, personality disorders, mental disorders and so on. Psychosis can only be said to be a concept in life, generally referring to mental disorders such as schizophrenia, and sometimes including more serious personality disorders or neurosis. But usually in the field of psychological counseling, psychological unhealthy often refers to mental health problems, that is, the situation that has not yet constituted abnormal psychology, just like the depression after our lovelorn love, which can only be said to be unhealthy, not psychological abnormality.