Poop refers to human feces. The color of normal human feces is usually yellow or yellow-brown, which is mainly determined by fecal cholestrol. If the patient’s feces appear grayish-white, greenish-red, reddish, jam-like red and asphalt-like black, etc., it means that the body may have different degrees of diseases, such as gastrointestinal hemorrhage, biliary obstruction and so on. 1. Grayish-white: when the feces appear grayish-white, it may be caused by obstructive jaundice or after barium meal imaging of the digestive tract, or it may be caused by the presence of barium sulfate in the feces. 2. Green color: green color of feces is usually caused by indigestion or eating a lot of green vegetables. 3. Red color: When the feces appear red, it may be caused by eating a lot of watermelon, tomatoes, etc. Or bleeding in the lower part of the colon such as the colon. Or bleeding in the lower part of the colon, such as colon cancer, rectal cancer, bleeding hemorrhoids and other symptoms can also lead to red feces. 4. Jam-like red: Jam-like red feces may be caused by acute amoebic dysentery. 5. black asphalt: black asphalt in feces may be related to food and medication, as patients consume more blood products, iron supplements, etc. If the feces appear black asphalt, the patient may have to pay for the medication. If the feces present tar-like, and even the presence of part of the blood, may be caused by gastrointestinal bleeding. Consumption of large quantities of mulberries, chocolate, etc. feces can also appear asphalt-like black. Patients should go to the hospital for examination and treatment in time to avoid further aggravation of the condition when the color of feces is abnormal in addition to the exclusion of eating factors.