Six-month-old babies are always crying at night for a variety of reasons, caused by physiological factors and pathological factors. Physiological factors are mostly seen in inadequate feeding, wet diapers, etc.; pathological factors are mostly seen in indigestion, acute abdomen, rickets and so on. 1. Physiological factors: such as underfeeding, baby hunger caused by crying, increase the number of breastfeeding or appropriate increase in complementary foods can be improved; wet diapers, if not found in time, urine, feces will stimulate the perineal skin, causing crying. 2. Pathological factors: such as dyspepsia, baby bloating, abdominal pain may cause crying at night; acute abdomen, such as intussusception, the baby crying often accompanied by jam-like stools, you can check the abdominal ultrasound clear; rickets, the baby is often accompanied by excessive sweating, occipital baldness and other conditions. Six-month-old baby crying at night, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.