Based on the theory of collateral diseases

this paper systematically summarized the theory and academic experience in the treatment of constipation in the WU’ s medical family. YE Tianshi used pungent drugs and moistening drugs to nourish yin and moisten the dryness

and attack the evil excess

so as to treat the constipation caused by dryness transformed from evil excess. At the same time

it also put forward the principle of treating constipation

such as "it should better unblock blood collateral

moisten

tonify

and should not treat dryness

heat and absorb the fluid. "and "avoiding hardness and dryness"and its academic thought is worthy of in-depth study.