In phobias, the main cause of anxiety must be an external situation or object that is easily identifiable and not currently dangerous, and which leads to a characteristic avoidance of these situations or objects or is endured with fear. Fearful anxiety can be distinguished from other anxiety in 3 ways: subjective, physical, and psychological, and its severity can range from mild uneasiness to fear. The patient’s concerns may be focused on individual symptoms, such as panic or feeling like fainting, or they may be accompanied by secondary fears, such as fear of losing control of oneself, dying, or going crazy. Knowing that others in the same situation would not feel dangerous or threatened does not alleviate their anxiety. Patients can produce anticipatory anxiety as long as they envision entering a scary situation. I. Characteristics 1. Strong fear of certain objects or situations, the degree of fear is not proportional to the actual danger; 2. The attack is accompanied by vegetative symptoms, such as dizziness, fainting, panic, trembling, sweating, etc.; 3. Avoidance behavior toward the object of fear; 4. Knowing that the fear is excessive, unreasonable, and unnecessary, but unable to control it. Second, the clinical type 1, place phobia: the object of fear is mainly some specific environment, such as high places, squares and crowded places. Patients are often afraid to leave home and go out, afraid to be alone, afraid to leave home in a powerless situation or can not immediately leave the occasion. One of the key features of place-phobic situations is the fear of not having an immediate exit, and some patients become completely trapped in their homes as a result. Many patients panic at the thought of having a nervous breakdown in a public place and therefore avoid the fearful situation. Although the degree of anxiety and avoidance behaviors can vary, fear of places is the most impactful of the various fear disorders on patient functioning. The majority of patients are female and the onset of the disorder is usually in early adulthood. Without effective treatment, the condition of place fear can fluctuate and can become chronic. 2, social phobia: the object of fear is mainly social situations and interpersonal contact, etc.. Such as fear of seeing people blush called red face phobia; fear of staring at people called phobia of people. 3, simple phobia (object phobia): the object of fear is mainly some specific objects or situations, such as fear of approaching specific animals, fear of heights, thunder, darkness, flying, closed spaces, urinating and defecating in public toilets, eating certain things, dental, witnessing blood or trauma, and fear of contact with specific diseases, so the promotion of the situation is very single, very specific, and can be like place fear and social fear like place fears and social fears. Specific fears typically emerge in childhood or early adulthood and can persist for decades if left untreated. The degree of impaired functioning depends on the ease with which the patient can avoid the fearful situation. In contrast to place fear, the fear of a fearful situation generally does not fluctuate. Each of these types of phobias may occur alone or in combination. Simple phobias, especially animal phobias, often begin in childhood; social phobias tend to begin in preadolescence; and agoraphobia tends to begin in the 20s and 40s. Animal phobias in children may slow down with age, while other types often have a tendency to be delayed.