Dreaming of a snake is a symbol of someone's treachery, or a disease in a certain part of the dreamer's body. The appearance of a snake in a dream is an ominous sign. Snakes indicate that there will be many difficulties, obstacles and betrayals.
Dreaming that a snake is entangled in himself is that he is terrified and can't get away, which means that the dreamer will see a person's betrayal and even he can't believe it.