There is a reason for dreaming: the dreamer feels that there is something wrong with him in some aspects, and the subconscious has carefully arranged a play to tell the dreamer the source of the problem.
The hints of dreams are hidden and symbolic. Only by understanding the language of dreams can we better accept the enlightenment of dreams.
The blood in the dream represents life itself and symbolizes strong emotions.
The dreamer's appearance in the dream of "dreaming that he is sick, draining his blood, and then having a big blood transfusion and checking for leukemia" symbolizes that the dreamer's subconscious thinks that his problems appear in the emotional world, and the dreamer is confused about the emotional problems caused by his interpersonal communication, and then generalizes to holding a negative attitude towards his emotional world. I hope to change completely because I have been hurt. But for how to change, the dreamer has no way. At the same time, the dream reveals that the dreamer has a certain degree of fantasy psychology, and always hopes that all the problems will disappear tomorrow morning, so he indulges in fantasy and does not make any beneficial actions to change it.
Life is to live, not to think.
Problems need to be solved by action, not by fantasy.