heat and dryness in the stomach depletes the fluids in the spleen. the excess in the stomach binds the fluid-depleted spleen, which is then unable to distribute fluids to the extremities. instead, the remaining fluids seep into the bladder, causing frequent urination. the intestines then become dry, causing constipation with hard stool that is difficult to expel. the dry, yellow tongue coating reflects the depletion of fluids and slight heat in the interior. the deep, rapid pulse is a classic indication of yin deficiency. when yin deficiency is accompanied by dryness in the intestines, a floating, choppy pulse may also appear, indicating interior stagnation.