1-year-old baby stool dark green black, the main causes include pigmentation, indigestion, acute gastroenteritis, upper gastrointestinal bleeding, it is recommended to consult a professional doctor, timely treatment. Common causes and treatment 1, pigment impact: eating or taking darker food or drugs, such as cocoa powder, iron, will lead to dark green stools, black, generally no treatment; 2, indigestion: eating too much or eating indigestible food, resulting in indigestion, intestinal peristalsis decreased, increased bilirubin content of stool, may be black; can be hot compresses or massage the abdomen; 3, acute gastroenteritis. Eating unclean food, causing gastroenteritis, resulting in faster intestinal peristalsis, bile is not fully mixed with food absorption, the formation of bilirubin under the action of bacteria, resulting in dark green stool; need to follow medical advice to the child oral lactobacillus, regulate intestinal flora, or give antibiotic treatment, such as amoxicillin clavulanic acid potassium granules; 4, upper gastrointestinal bleeding: if the stool dark green black, may be upper gastrointestinal bleeding The cause, need to fasting, reduce the intestinal burden, timely rehydration, follow medical advice to use vasopressin, if the bleeding is serious, can be surgical treatment. The child’s diet should be reasonable and easy to digest, such as thin gruel, ensure a clean and hygienic diet, forbid cold food, replenish water, and eat probiotic food to promote gastrointestinal dynamics.