Inferiority, also known as inferiority complex, refers to the negative mentality that individuals experience their own shortcomings, incompetence or inferiority. As opposed to superiority. In Adler's view, it is a normal universal phenomenon of human beings, which stems from the weak sense of helplessness of infants and is aggravated by psychological, physical and social obstacles (real and imagined). It has a dual impact on personality development. Moderate inferiority can generate the need for achievement and turn it into the driving force for progress. A heavy sense of inferiority is not conducive to human development. There are two situations: improper overcompensation will make people lose more than they gain; It will be difficult to adapt to life if you become inferior.