Dark green stool and constipation may be associated with physiological reasons such as improper diet, but also with indigestion, intestinal infections and other pathological reasons, can be prescribed to take gastrointestinal dynamics drugs, laxatives, antibacterial drugs such as domperidone, lactulose, norfloxacin and so on for treatment. 1. Physiological reasons: if patients eat too much food containing too much green pigment, it will lead to a large amount of pigment can not be absorbed by the gastrointestinal tract, thus appearing dark green stools, if at this time due to the reduction of the amount of exercise, eating too much greasy stimulation of food, etc., the patient will appear constipation. It can be treated by improving dietary habits or taking gastrointestinal stimulants, laxatives, probiotics such as domperidone, lactulose, bifidobacteria and so on as prescribed by the doctor. 2. Pathological causes: If there is a combination of intestinal infections such as pediatric enteritis, pseudomembranous enteritis or intestinal diseases such as dyspepsia, the patient may have green, thin, pasty stools accompanied by constipation. In this case, we need to treat the cause of the disease, and we can take antibacterial drugs, gastrointestinal stimulants such as norfloxacin and domperidone as prescribed by the doctor for treatment. The causes of dark green stool and constipation are many, it is recommended to consult a doctor for a clear diagnosis and then follow the doctor’s instructions for targeted treatment, so as not to delay the condition.