4 months baby stool paste, can be caused by functional dyspepsia, intestinal infection and other factors. 1. Functional dyspepsia: If the baby’s bowel movements are not frequent, only occasionally the bowel movements show a sticky paste, it is very likely that functional dyspepsia has occurred, the bowel movements contain undigested protein and the appearance of paste. 2. Intestinal infections: when the baby’s stools are mushy and the number of bowel movements increases compared to the previous ones, and the stools contain more water, intestinal infections may have occurred. The most common are viral and bacterial infections, the stool can be sticky paste or thin water eggdrop soup-like, in addition to vomiting, fever and other symptoms. If your 4-month-old baby’s stools are mushy, you should seek medical attention in a timely manner, and under the guidance of a specialist, you can actively pursue appropriate treatment to help alleviate the discomfort as soon as possible.