2-month-old babies with decreased appetite and lethargy may be related to colds, gastrointestinal disorders, micronutrient deficiencies, anemia and other factors, and need to clarify the cause of the disease and then treat the symptoms. Common causes and treatments: 1, colds: fever caused by colds may cause drowsiness, lack of appetite, flushing, listlessness and other manifestations of the need to go to the hospital in a timely manner; 2, indigestion: if feeding improperly caused by indigestion, the accumulation of food in the stomach, which can affect the baby’s appetite, so that eating is reduced, accompanied by drowsiness manifestations. Can be clockwise massage toddler abdomen, promote intestinal peristalsis, can be appropriate to give probiotics oral regulation of gastrointestinal flora, in order to alleviate the symptoms; 3, micronutrient deficiencies: toddlers lack of vitamin A, vitamin D, and zinc deficiency, etc. can lead to loss of appetite, lethargy, you can improve the micronutrient testing, supplemental medication under the direction of a doctor; 4, anemia: toddlers with insufficient production of red blood cells or insufficient iron in the body, and other reasons lead to anemia, there can be fatigue. The cause of anemia can be fatigue, weakness, indigestion and other manifestations, the cause can be identified after adjusting the feeding method or through rehydration to alleviate the symptoms. Precautions: In addition, hypothyroidism, pneumonia, encephalitis and other diseases can cause a decrease in appetite and lethargy in young children, you should pay attention to observe the changes in young children, and if the symptoms are not relieved for a long time, you should go to the hospital as soon as possible, so as to avoid delaying the condition.