The baby two months weight did not grow, may be improper feeding and other external factors, may also be congenital heart disease, congenital hypertrophic pyloric stenosis and other diseases. 1. external factors: if the mother’s feeding is not appropriate, or give the baby a small amount of diet, the body due to lack of nutrition, can not meet the baby’s growth needs, the baby’s two-month weight does not grow the situation. 2. Congenital heart disease: congenital heart disease may be genetic, electromagnetic radiation, air pollution and other factors. Affected children can appear developmental disorders, fatigue, chest tightness, etc., manifested in the baby two months weight did not grow. 3. Congenital hypertrophic pyloric stenosis: it may be caused by abnormal ganglion cell development and other factors. When the child vomiting for a long time, easy to appear dehydration, manifested in dry skin, weight for a long time does not increase or lose the situation. The baby two months weight did not grow, there may be other reasons, 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.