Two years and eight months old baby crying performance may be caused by environmental influences, calcium deficiency, indigestion and other factors. 1. Environmental influence: if suddenly stay in an unfamiliar environment, will lead to the child to produce fear, anxiety and other feelings of anxiety, thus appearing to cry. 2. Calcium deficiency: the lack of calcium in the body will stimulate the cerebral cortex and produce excitement, but also cause abnormal neural electrical activity in the brain tissue, leading to the symptoms of baby crying. 3. indigestion: children eat too much undigested, will lead to gastrointestinal peristalsis and gastric dynamics, thus causing abdominal pain and other discomforts, the pain is strong, it will lead to the symptoms of the baby crying. When the two-year-old eight-month-old baby crying symptoms, parents should pay attention, take the child to the hospital pediatrics.