The difference between true hallucination and false hallucination is mainly manifested in three aspects, i.e., source, sense organs and content. True hallucination is from the objective space, is obtained through the sense organs, the content of the hallucination is more image, vivid, distinct, clear, complete; while false hallucination is from the subjective space, not through the sense organs, the content of the hallucination is more fuzzy, unclear, incomplete, for example, you can hear the opposite side of the building someone with their own conversation, said that the home is too hot, 32 ° C, and every day we have to open the windows to ventilate the air, or else we can’t sleep. This is a true hallucination when the family can’t hear it. Another example is to be able to see a person sitting on the sofa in your head, but you can’t see who it is, which is a false hallucination.