Cleanliness is not a medical term; it is a dictionary term that refers to a fetish for excessive cleanliness. Generally speaking, a love of cleanliness and personal hygiene does not require special treatment as long as it does not bother you or others and does not interfere with normal life. What needs to be treated is cleanliness that meets the diagnostic criteria for obsessive-compulsive disorder, where one feels uneasy if one does not clean excessively, and where washing becomes a compulsive, uncontrollable behavior. From a medical point of view, this is called obsessive-compulsive washing. The most effective treatment for OCD is medication and psychotherapy, either simultaneously or sequentially, and requires treatment under the supervision of a specialist. On top of medication, the more operative behavior modification methods are usually the following: 1. Systematic desensitization therapy: list the things, scenes or things that make the patient feel dirty, from light to heavy in different degrees, and then start contacting the least dirty things every day, but hold back, don’t wash your hands or reduce the number and time of washing, and then contact the dirtier things, until you can contact the 2, aversion therapy: you can wear a rubber band on the wrist, once the compulsive washing behavior, they will use the rubber band to play their wrists, until the compulsive ideas or behaviors disappear with pain; 3, full of therapy: let the patient sit in the room and ask relatives or good friends as helpers, first let the patient relax, and then directly let the patient touch what they think is the dirtiest or the most intolerable Tolerate anxiety feelings, but not cleaning. The assistant should encourage the patient to persist and forbid the patient to clean until the anxiety is reduced to the point of disappearance, and the training should be repeated. The patient should be in good physical condition and have strong will power to do so.4. Other: Patients can arrange a fixed period of time each day to do things that interest them, or exercise to distract themselves, which can also reduce the symptoms of compulsive washing to some extent.