Possible causes of a bad anus that makes it difficult to pass stool include dry stool, anal obstruction constipation, anal stenosis and hemorrhoids (internal piles). Difficulty in defecation may be due to recent consumption of more indigestible food, resulting in excessively dry and hard stools, making it difficult for the anus to pass stools, in which case you can use Kefir to help with defecation. Anal obstruction constipation is mostly seen in the elderly and patients who are bedridden for a long period of time. Due to the aging of the organism or the long-term lack of exercise, the function of anal sphincter muscle decreases, resulting in the inability of the anus to expel the stool. The cause of anal stenosis may be anal fissure, anal fistula and perianal abscess, etc., after the healing of the trauma, the anus locally formed contracture or scar, making the anus narrow, resulting in the stool is not easily discharged. The common clinical symptom of internal hemorrhoids is intermittent bleeding after defecation, and some patients also have difficulty in defecation. If the frequent occurrence of defecation difficulties, it is recommended to go to the regular hospital in time, improve the relevant examination, clear the cause of the disease, in the guidance of professional doctors to carry out reasonable standardized treatment.