Nasty sounding condition. Here's a link[1] and a summary,
> ...a mental disorder in which the people have persistent or recurrent feelings of depersonalization and/or derealization... Depersonalization is described as feeling disconnected or estranged from one's body, thoughts, or emotions. Individuals experiencing depersonalization may report feeling as if they are in a dream or are watching themselves in a movie... derealization is described as detachment from one's surroundings. Individuals experiencing derealization may report perceiving the world around them as foggy, dreamlike/surreal, or visually distorted... the inner turmoil created by the disorder can result in depression, self-harm, low self-esteem, anxiety attacks, panic attacks, phobias, etc.
> ...a mental disorder in which the people have persistent or recurrent feelings of depersonalization and/or derealization... Depersonalization is described as feeling disconnected or estranged from one's body, thoughts, or emotions. Individuals experiencing depersonalization may report feeling as if they are in a dream or are watching themselves in a movie... derealization is described as detachment from one's surroundings. Individuals experiencing derealization may report perceiving the world around them as foggy, dreamlike/surreal, or visually distorted... the inner turmoil created by the disorder can result in depression, self-harm, low self-esteem, anxiety attacks, panic attacks, phobias, etc.
[1] https://en.wikipedia.org/wiki/Depersonalization_disorder