Perfectionism, in psychology, is a broad personality style characterized by a person's concern with striving for flawlessness and perfection and is accompanied by critical self-evaluations and concerns regarding others' evaluations.

It is best conceptualized as a multidimensional and multilayered personality characteristic, and initially some psychologists thought that there are many positive and negative aspects. Perfectionism drives people to be concerned with achieving unattainable ideals or unrealistic goals, often leading to many forms of adjustment problems such as depression, low self-esteem, suicidal thoughts and tendencies and a host of other psychological, physical, relationship, and achievement problems in children, adolescents, and adults, although perfectionist sights can reduce stress, anxiety, and panic.

More Info: en.wikipedia.org