Constipation in babies at eight months may be caused by dietary factors, indigestion or anal stenosis. It can be treated by changing the daily diet, taking medication or taking anal dilatation according to different situations. 1. Dietary factors: Constipation can be caused by too little water in milk powder, insufficient daily water intake, or changes in eating habits. You can add beans, fruits and vegetables in the complementary food to increase gastrointestinal peristalsis and cure constipation. 2. Indigestion: poor diet can easily lead to baby indigestion, which can cause the stool to stay in the abdominal cavity for too long, the water in the stool is absorbed too much, resulting in constipation. You can follow the doctor’s instructions by taking medication for treatment, such as bifidobacterium bifidum triple live bacteria, bacillus subtilis double live bacteria granules, etc., can regulate the intestinal flora, to improve the baby’s constipation. 3. Anal stenosis: Congenital anal stenosis in babies can cause difficulty in passing feces, resulting in constipation. Mild anal stenosis can be treated through long-term repeated anal expansion, most children can restore normal bowel function. If your baby is constipated at eight months, it is recommended to consult a doctor to identify the cause of the problem and provide targeted treatment or therapy.