Liver qi stagnation refers to the loss of liver detachment (abnormal function of liver detachment), which causes stagnation of qi, resulting in depression and poor qi and blood circulation. The Liver is the master of detachment and excretion, favoring relief and disliking depression. Liver deficiency or depression can cause liver qi stagnation, which often manifests as chest pain, chest tightness, epigastric distension, belching (hiccups), menstrual disorders, and so on. Liver qi stagnation (liver qi and blood transportation is not smooth, emotional depression) caused by stagnation of qi, qi and blood operation is not smooth, phlegm and dampness stasis in the skin, can cause itching, urticaria, etc. Treatment can be used to ease the liver to resolve depression (by dredging the liver qi to treat depression), regulating qi and phlegm, blood activation, etc. Usually, we should pay attention to avoiding spicy and cold food, and keep a relaxed mood. If there are symptoms related to urticaria, it is recommended to go to the hospital, and choose the appropriate treatment plan after the professional Chinese medicine practitioner clearly identifies the symptoms.