(1) times: Adults who defecate more than 3 times a day or less than 3 times a week should be regarded as abnormal defecation.
(2) Character: When dyspepsia or acute enteritis occurs, the frequency of defecation can be increased, and the feces are mushy or watery. When constipated, the feces are dry and hard, showing chestnut-like. Rectum and anal stenosis, feces are flat or banded.
(3) Color: When the upper digestive tract bleeds, the feces are dark and shiny tarry stool; The stool is dark red when the lower digestive tract bleeds; When the biliary tract is completely blocked, it is clay-colored; Amoeba dysentery or intussusception can be jam-like; Bloodshot on the surface of feces or blood dripping out after defecation is more common in patients with anal fissure or hemorrhoid bleeding.
(4) Odor: patients with dyspepsia have sour feces; Tarry stool with upper gastrointestinal bleeding, with fishy smell; Patients with rectal ulcer or intestinal cancer have rancid feces.
(5) Mixture: A large amount of mucus is mixed in feces, which is common in intestinal inflammation; People with purulent blood are common in dysentery and rectal cancer; Ascaris and tapeworms can be seen in feces when intestinal parasites are infected.