50 days of babies do not sleep crying, may be hungry, should be fed in time; abdominal discomfort, should go to the hospital for treatment; vitamin D deficiency, should be supplemented with vitamin D in time; environmental discomfort need to improve the environment, etc.. 1. Hunger: the baby with the growth and development, the amount of food gradually increased, if the breast milk secretion is insufficient, the baby is hungry, can not sleep, will appear to cry. Baby moms pay attention to increase nutrition, if necessary, go to the hospital lactation department. 2. Abdominal discomfort: the baby’s abdomen is cold, causing intestinal cramps, abdominal pain, abdominal distension symptoms, you can first hot compress the navel, most can be relieved. Intestinal obstruction, intussusception and other diseases can also cause abdominal pain, then you need to go to the hospital in time for treatment. 3. Vitamin D deficiency, resulting in disorders of calcium and phosphorus metabolism in the body, increased nerve excitability, but also easy to worry, irritable, newborns can start supplementing vitamin D 2 weeks after birth. 4. Inappropriate environment: too cold or too hot indoors may cause children to be irritable. The surrounding environment is relatively noisy, strong light, etc., can also cause the baby to cry. Pay attention to provide a quiet and comfortable sleep environment for your baby. If the crying does not subside after the possible triggers are removed, go to the hospital as soon as possible.