Two and a half months of the baby anorexia, may be a normal performance, may also be indigestion, enteritis and other diseases caused by abnormal performance. 1. Normal performance: after birth, the baby has a sucking reflex and can suck milk normally. Around two and a half months after birth, some babies may have a transient anorexia, but the baby is healthy and has no symptoms of discomfort, which may be a normal manifestation. 2. Indigestion: If your baby suffers from indigestion at two and a half months of age, he or she may suffer from bloating, abdominal pain and other symptoms, which may cause anorexia. 3. enteritis: two and a half months baby body is relatively weak, bacteria into the intestinal tract caused by inflammatory lesions in the intestinal tract, may cause the baby anorexia, abdominal pain, diarrhea, abdominal distension and other symptoms. Two and a half month baby anorexia causes more, need to be under the guidance of a professional doctor, according to the specific condition of the treatment.