Seven or eight months baby always crying at night, can be due to environmental factors, dietary factors, disease factors, sleep is more important for the growth and development of seven or eight months baby, such as frequent crying, and accompanied by other symptoms of discomfort, should be timely medical care, a clear diagnosis of targeted treatment. First, environmental factors: such as the baby in the daytime by the shock stimulation, may lead to nightmares at night, or the night did not change the diaper in time, indoor too cold or too hot, can be caused by seven or eight months of the baby is always crying at night, should try to create a comfortable sleep environment for the baby to maintain a suitable indoor temperature, to avoid noise, light and other situations, so as not to affect the baby’s sleep. Second, dietary factors: such as eating more before going to bed, easy to bloating, due to discomfort symptoms, can be manifested as seven or eight months the baby is always crying at night, should promptly adjust the eating habits, small meals, reasonable arrangement of diet, so as not to affect the normal sleep. Third, disease factors: 1, calcium deficiency: calcium deficiency after the blood calcium concentration is reduced, easy to cause nerve excitation, resulting in seven or eight months baby always crying at night performance. Can go to the hospital to check the trace elements, such as calcium deficiency, should follow the doctor’s instructions to use calcium gluconate tablets, calcium carbonate and other drugs for treatment; 2, gastrointestinal dysfunction: such as inhalation of large amounts of air, abdominal cold, improper feeding and other factors, resulting in gastrointestinal dysfunction or intestinal colic, intestinal intussusception, and other conditions, can also be manifested as seven or eight months baby crying at night, can be used in accordance with the instructions of the doctor, the bifidobacterium bifidum triplet Bifidobacterium bifidum triplex, bacillus subtilis bifidus granules and other probiotics for treatment, regulating the gastrointestinal flora, alleviate the discomfort symptoms; 3, parasitic infections: such as infected with roundworms and other parasites, due to the worm activity at night, so that the baby appeared to be uncomfortable, can appear in seven or eight months the baby is crying all the time at night, you can follow the doctor’s instructions to use albendazole, bis(hydroxylated) thiopyrimidines, and other medications for treatment.