Taking anti-inflammatory and stomach-healthy herbs may result in black stools. Black stools are usually caused by damage to the gastrointestinal veins and blood overflowing out of the veins, but eating a large amount of black or iron-containing foods or medicines may also cause black stools. Taking anti-inflammatory and stomach-healthy Chinese medicines, such as Stomach-Healthy and Anti-inflammatory Granules, which contain Qingdai and Umei, etc., will cause black stools. Generally, significant relief can be seen after stopping the medication. If accompanied by other obvious gastrointestinal symptoms, or after discontinuing the use of black stool, it is likely to be blood in the stool, we should consult a doctor in a timely manner, improve the relevant examination, to avoid delaying the condition. It is recommended that people with dark-colored stools should consult a doctor in time to complete the examination, so as to avoid delaying the condition.