Most people regard self-criticism as healthy and necessary for learning, but excessive or enforced self-criticism as unhealthy.
Under some totalitarian systems of communism, important party members who had fallen out of favor with the political elite were sometimes forced to undergo "self-criticism" sessions, producing either written or verbal statements detailing how they had been ideologically mistaken, and affirming their new belief in the party line. Self-criticism, however, did not guarantee political rehabilitation, and often offenders were still executed.
In the People's Republic of China, self-criticism, called jiǎntǎo (检讨) in Chinese, is an important part of Maoist practice.