Mucus in the stool of a two-month-old baby is most often considered to be caused by indigestion or gastrointestinal infection. Parents need to carefully observe and adjust the feeding method, and take the baby to the hospital to check the stool routine, to investigate the cause of the disease. Common causes and treatment 1, indigestion: If the stool routine results are not abnormal, consider that the gastrointestinal tract is not fully functional resulting in indigestion, the mucus appeared for the shedding of intestinal epithelial mucosal cells. Parents can let their children take appropriate probiotics to adjust the intestinal environment and promote the normal functioning of the gastrointestinal tract; 2, gastrointestinal tract infection: common enteritis in children for rotavirus, norovirus enteritis, the initial stage can be manifested as mucus in the stool, the condition progresses to dilute stool, egg-flake soup-like stool, watery stool, if the stool routine shows abnormal white blood cells, suggesting that bacterial infection may occur in the intestinal tract. Most children do not need anti-infection treatment and may be treated with rehydration if dehydration occurs. When the baby has abnormal stools, the mother should adjust her diet, avoid eating too much greasy and indigestible food, eat more light and nutritious food, and actively observe the changes in the baby’s stools to prevent diseases and abnormalities.