Newborns crying in the second month may be caused by physiological factors, but also may be related to indigestion, calcium deficiency and other factors. 1. physiological factors, if usually often let the baby in the excessive noisy environment or the baby hungry urine may appear the symptoms of the second month crying. 2. indigestion, if the baby often eat too much at once, gastrointestinal dysfunction, indigestion may affect the baby’s digestion and absorption, the baby’s body is not well, so there may be the symptoms of the second month of crying. 3. Calcium deficiency, if the baby’s body lacks calcium, may lead to excessive mood swings, crying, irritability and other symptoms. Newborns crying in the second month 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, under the guidance of the doctor to give targeted treatment or treatment.