What should I do if my 2-month-old baby poops once after feeding?

A two-month-old baby can poop once after eating milk for pathological conditions (e.g. lactose intolerance), physiological phenomena, the intervention needs to be carried out according to the cause, such as lactose intolerance requires oral lactase and other interventions.
1. Pathological conditions
(1) Lactose intolerance: 2-month-old babies may have insufficient lactase enzyme in the intestines, and diarrhea symptoms may occur after eating breast milk or formula milk, such as an increase in the number of stools, stools are dilute and other phenomena, for such babies, serious babies may have poor weight gain, if you consider that the disease should be treated by oral lactase, if necessary, need to be adjusted to lactose-free milk powder for feeding.
(2) infectious diarrhea disease: can be caused by bacterial, viral infections, the above phenomenon, the treatment needs oral montelukast to stop diarrhea and Saccharomyces boulardii to regulate the intestinal flora to alleviate the above symptoms, such as bacterial infections, according to the allergy to choose the application of antimicrobial drugs such as cephalosporin. If the infection is viral, it is self-limiting and can not be treated with special drugs.
2. Physiological phenomenon: for the age of some babies, especially breastfed babies can appear the above phenomenon, the number of bowel movements per day is more, for about 6~7 times, but the baby weight growth is good, no abnormal discomfort, it is considered to be normal, no need for special intervention, dynamic observation can be.
It is recommended that babies with the above conditions to consult a doctor in a timely manner, by the judgment of a specialist to guide the treatment. The above drugs should be used under the guidance of a physician.