Dysthymia is a class of mental disorders caused by significant events, intense internal conflicts, emotional experiences, suggestion or self-referral acting on the dysthymic individual, mainly manifested as two kinds of separation symptoms and conversion symptoms: separation symptoms refer to the complete or partial incompatibility of perceptions of past experiences, present-day environment, and self-identity; conversion symptoms refer to life events or situations causing emotional reactions that are converted into somatic symptoms, and once somatic symptoms appear, the emotional response makes fade or disappears. Hysterical pain is wandering and can be found in the head and neck, precordial region, etc., and is usually not limited to a single location or to an innervated area. The nature, intensity, and distribution of the pain change from time to time and are related to attention or suggestion. In some patients, a feeling of air rising from the lower abdomen to the chest and throat, causing a sense of urgency in the chest and obstruction in the throat, is called hysterical ball syndrome.