One year old baby dilution, stools have sour odor is mostly due to indigestion, and parents improper care and the digestive system is not yet well developed. The ability of one year old babies to digest food is relatively weak, if the parents do not take care of the baby cold or eat not easy to digest complementary food, it is easy to induce dyspepsia symptoms, showing dilution, stool sour odor symptoms. It is necessary to consult the doctor in time and give symptomatic adjustment or treatment as soon as possible after the diagnosis is clear. Specific treatments include strengthening daily care, avoiding cold stimulation, abdominal heat massage, adjusting the structure of complementary foods, and taking probiotics when necessary, such as Bacillus subtilis bacillus granules or bifidobacterium trilobacterium, etc., to regulate the micro-ecological balance of the intestinal tract, and to promote the earliest possible recovery. One year old baby diarrhea, stool with sour smell, there may also be other causes, such as acute enteritis, etc., it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment, the above medication as prescribed by the doctor.