Baby sleepy and not sleepy and crying may be caused by hunger, lack of calcium, indigestion and other reasons. 1. Hunger: If breastfed or artificially fed babies don’t have enough milk before bedtime, they may still be hungry. In this case the baby can’t sleep well even if he is sleepy and may cry. 2. Calcium deficiency: lack of calcium, resulting in increased excitability of the baby’s cerebral cortex, there will be a baby sleep difficulties, may have been more sleepy, but still do not sleep, the phenomenon of continuous crying. 3. Indigestion: babies eat too much leading to indigestion, causing babies to have bloating, abdominal pain and so on. The baby will also appear although already very sleepy, but still do not sleep, crying and other phenomena. The baby sleepy not sleep and crying may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.