Answers:
Munchausen syndrome is fake an malady to return with attention. People sometimes will in actual fact motive themselves mar (injecting something toxic in an IV, for example).
This is not indistinguishable as self-injury close to adjectives or burning.
Both are psychiatric conditions, but the objective of Munchausen is to draw from sympathy/compassion. The party will be speaking and attention-seeking.
The dream of self-injury is more to relieve stress or pressure. People who do this will repeatedly try to hide away it, or produce up reason for their injuries.