Tannins are delay stool.

Strong black tea, blueberry, cacao, red wine, rubbed meal, sticky meal, mucus soups, rubbed porridges, manna,rice. And prevent hard stool is water,drink her till 2/day if doctor allows, eating till 5 times/day, do not add a big rests between meal pause,and brans are energy for you,as stimulates bowel,add theirs in kefir.
Do not long time lie in bed,add exercises, do not use laxative for a long time,theirs using causing addiction,and a lost a habit for a self position for defecation, as avoiding in dyskinetic kinds,as in psychogenic and neurotic influences,try to be a calm,eat right, move..