The seven emotions are too extreme and the stimulation is too lasting, which exceeds the body's adjustment ability, leading to emotional imbalance, especially sadness and anger. When anger injures the liver, the liver loses its function, the qi is exhausted, and the liver qi stagnates. When qi stagnation turns into fire for a long time, it is fire depression; Qi stagnation and blood stasis are blood stasis; Incomplete planning or excessive anxiety, long-term depression hurts the spleen, and the spleen loses its health, causing dampness, phlegm and heat.
(2) Physical factors
Originally, liver qi was strong, or physical weakness, coupled with emotional stimulation, liver depression and spleen depression, diet gradually decreased, and biochemical sources were extensive. After a long time, the heart and spleen will be deficient in qi and blood, or depressed fire will consume blood, and yin deficiency will be heart disease and kidney. For example, "The Origin of Miscellaneous Diseases, Rhinoceros Candles and the Origin of Various Depressions" said: "The diseases of various depressions and dirty qi are also caused by excessive thinking and weak dirty qi, so the diseases of six depressions are also caused."