The first month of life is a very important time to care for your child, and it is very easy for him to cry suddenly, especially at night when he may not be hungry or poop or pee, but he cries all the time. It is very important to learn to observe the smallest changes in the newborn baby. 1, may be at first under the care of the family, habitual in the sleep to go to walk shaking pat, but just put to bed and woke up, to go to the child has been to develop good habits. 2, most of the sudden crying at night is because the child has a sense of hunger, the child in the birth of physiological weight loss, generally after two weeks can return to the birth weight, so go to ensure the quality of their own breast milk. 3, the child will also cry loudly after playing tired, may last in about 10 minutes, or even longer, then the more tired the child, the louder his cry will be should choose a quiet environment, 20 minutes ahead of the child gradually into a sleep state. Most children’s crying is due to hunger or a change in habits, but if a child gradually develops a fever, it is important to find out the cause in time to prevent the child’s condition from becoming more serious, and once the temperature is higher than 38 degrees 5, go to a children’s hospital for a detailed examination.