Normally, the stool is soft yellow, 1-2 times a day, no more than 3 times a day, or once every 2-3 days. Abnormal stools include changes in color, shape, and frequency of stools. If the stool is black or red, gastrointestinal bleeding should be considered after excluding the effects of food and medications. If the stool is pus and blood, and the stool is unformed, thin, watery, and frequent, more than 3 times a day, inflammation of the intestinal tract should be considered. If the stool is particularly dry or even granular, accompanied by difficulty in passing stool and only 1 stool every 3 days or more, constipation should be considered. If there is a problem with the stool, you should go to the hospital in time to avoid delaying the condition.