Obsessive-compulsive disorder (OCD) is a neurological disorder characterized by obsessive-compulsive thoughts and actions. It is characterized by the co-existence of conscious self-compulsion and conscious counter-compulsion. Patients know that the persistence of obsessive-compulsive symptoms is meaningless and irrational, but they cannot restrain their recurrence, and the more they try to resist, the more nervous and painful they feel. If the disease is prolonged, ritualistic actions may be the main manifestation, and although the mental pain is significantly relieved, the social function is seriously impaired. Common manifestations of OCD: When one or more of the following symptoms persist and interfere with normal life, it is time to consider seeking counseling and treatment from a psychiatrist: 1) often sensitive to germs and various diseases and worry unnecessarily; 2) often wash hands repeatedly and for a longer time than normal; 3) sometimes repeat the same words several times for no reason; 4) feel that they 4. feel that they have to follow a special order when dressing, washing, eating, and walking; 5. often do certain things over and over again without necessity, such as checking doors and windows, switches, gas, money, documents, forms, letters, etc.; 6. have doubts about most things they do; 7. often unconsciously think of some unpleasant memories or thoughts that one cannot get rid of; 8. often think that their small mistakes will cause 9, from time to time for no reason to worry about their own illness; 10, from time to time for no reason to count or repeatedly chant a song; 11, in some occasions, very afraid to do embarrassing things; 12, when the sight of knives, daggers and other sharp objects will feel distracted; 13, to completely remember some unimportant things and bother; 14, sometimes for no reason to destroy some 15.In some occasions, even if you are sick at the time, you want to eat a meal; 16.When you hear about suicide, crime or illness, you will be distracted for a long time, and it is difficult not to think about it; 17.There are cleanliness, fantasy, e-mail syndrome, excessive masturbation and other manifestations.