Babies always sleep hard in most cases belong to the normal physiological phenomenon, generally do not need to do special treatment, just born baby growth is relatively rapid bones, muscles, skin are growing rapidly, more through the constant effort to relieve muscle fatigue generated by discomfort. The baby’s sleep cycle is short, and the phenomenon of hunger and crying can easily occur at night, and the baby’s mother can give her milk for nutrition supply by straining and crying, and the baby is separated from the environment in the mother’s womb, and is not adapted to the new environment. Calcium deficiency can also occur in this case, usually must pay attention to appropriate supplementation of vitamin AD, baby mother should pay attention to increase dietary nutrition more meat, fish, eggs and fresh vegetables, usually pay more attention to give the baby massage body, try not to let the baby sleep prone.