Six-month-old baby farts stinky, may be related to dietary factors, may also be due to indigestion, constipation and other reasons. 1. Dietary factors: six-month-old babies are mainly breastfed or formula-fed, and these foods are rich in protein, which can easily cause fart odor. 2. Indigestion: the gastrointestinal digestive system of six-month-old babies is not very mature, and the digestive function is relatively weak. If the child is fed too much milk at one time, or if too much complementary food is added, this may cause indigestion, resulting in gastrointestinal dysfunction, which may cause farting odor, and may be accompanied by abdominal distension, abdominal pain and other manifestations. 3. constipation: part of the six months of the child usually if the amount of water is not enough, intake of vegetables, fruits, or congenital megacolon and other diseases, may lead to constipation, resulting in more feces can not be discharged in a timely manner, resulting in farting stinky, but also can be accompanied by poor appetite, abdominal pain and other symptoms. Six-month-old babies fart odor, may also be caused by other reasons, if there are other symptoms of discomfort, it is recommended to consult a doctor as soon as possible, to give targeted treatment.