Adults have dark green stools, which may be caused by dietary factors that simply change the color of the stool, or may be caused by indigestion. Common causes and treatment methods 1, diet: stool color is more affected by food. If the patient eats a lot of green vegetables, such as spinach, celery, leeks, etc., the color of these foods will cause the color of the stool to change, which is normal and does not require special treatment; 2, indigestion: the digestive and absorption capacity of the gastrointestinal tract is weakened, causing inadequate absorption of food, feces containing bile by oxidation, will also lead to a green color. Patients can take some oral drugs to promote digestion symptomatic treatment. Commonly used are multi-enzyme tablets, stomachic tablets, etc. The use of drugs should consult the advice of a professional doctor. Patients should also pay attention to adjust the function of the gastrointestinal tract through diet, do not eat cold, greasy, spicy food, and avoid overeating. The color, nature and smell of the stool can reflect the health condition of the body. Normal stool is generally yellow, banana-shaped, non-sticky and slightly smelly. If abnormalities are found, one should go to the hospital for gastroscopy and other related examinations in time to prevent the disease from progressing and spreading.