A patient with obsessive-compulsive disorder is not sure whether the world is real, does not believe that what he sees is real, and is not sure that what he does is really happening. For example, she shut off the faucet at home because she wasn't sure if it was really turned off. For example, she broke the key in the lock cylinder because she was not sure whether the door was locked. For her, the whole world seemed to be covered in a haze, and she could never wipe off the dirt on her glasses. So when she woke up and found that she was not in her bed at home, she was very calm... And continued to sleep.