It is considered that the key pathogenesis of ulcerative colitis lies in spleen and kidney

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deficiency combined with damp-heat accumulation in the intestines. It is advocated to treat the disease by the combined application of warming and clearing methods. In clinical practice， treatment is differentiated accor

ding to the disease stage.During the active stage， the pathogenesis tends to involve damp-heat accumulation， and treatment should focus more on clearing heat while moderately warming

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； during the remission stage， the pathogenesis tends toward spleen and kidney

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deficiency， and treatment should focus more on warming

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while appropriately clearing heat. Once the condition stabilizes， a combined approach of warming and clearing is used to regulate the spleen and kidneys and to consolidate the therapeutic effect.