Sticky thinking is common in epilepsy, dementia, or schizophrenia. It refers to associations that do not easily unfold, showing marked inertia and constantly dwelling on the same issue. The clinical differential diagnosis needs to be made with the following symptoms. 1.Thinking runaway: This is manifested by an increased amount of thinking activity and rapid shift. 2, slow thinking: this is an inhibitory thought association disorder. 3, thinking poor: these symptoms are similar in appearance and slow thinking, but there is a fundamental difference. The main characteristics are: the content of the mind is empty, poor concepts and vocabulary, often no clear response to general inquiries, or simply answer to do not understand, nothing, and usually do not actively talk. Patients feel that their minds are empty and that they have nothing to think or say. However, the patient is indifferent to this. Most often seen in schizophrenia or cerebral organic dementia state. 4.Thoughts break down: The patient’s thought association process breaks down in a clear consciousness, lacking the inner sense of coherence and proper logic. 5. Scattered thinking: The patient’s thinking activity may be characterized by loose associations, scattered content, a lack of pertinence and relevance to the problem, and a lack of certain logical relationships, giving the impression that it is difficult to converse, and that the subject and intent of his or her words are not easily understood. This is an early symptom of schizophrenia. 6. Thought interruption: The patient’s thought process is suddenly interrupted within a short period of time without any consciousness impairment and without obvious external interference, or the speech is suddenly stopped. Such interruptions occur involuntarily by the patient. Most often seen in schizophrenia. 7, incoherent thinking: superficially similar to thought rupture, but it arises in the context of severe impairment of consciousness. 8, pathological redundancy: when the patient is recounting things, he or she goes to great lengths to give unnecessary, detailed and cumbersome descriptions of individual details, so that some meaningless and cumbersome sections obscure the main content of the problem.