Etiology and Pathogenesis 1.Constipation due to heat .2.Constipation due to Qi Stagnation 3.Constipation due to Deficiency of Qi and Blood 4.Constipation due to ColdEtiology and Pathogenesis 1.Constipation due to heat 2. Constipation due to Qi Stagnation 3.Constipation due to Deficiency of Qi and Blood 4. Constipation due to Cold