1, irregular breathing: the newborn’s breathing is not only superficial, but also irregular, with fast and slow uneven phenomenon. This is mainly because the newborn intercostal muscles are weak, the nasopharynx and trachea is narrow, poor alveolar adaptability, breathing mainly by the diaphragm lift, so the newborn to abdominal breathing. Thoracic respiration is weak and shallow, and each exhalation and inhalation of the newborn is small, which cannot meet the body’s need for oxygen, so breathing is faster, up to 40-50 times per minute, which is a physiological phenomenon. Warning: If you have a cough, purple face, spitting foam, you should seek medical attention. 2, chin shaking: newborns appear involuntary chin shaking, not accompanied by other symptoms, is a normal physiological phenomenon. This is due to the fact that the neonatal nervous system is not yet well developed and the inhibition function is poor. Warning: Pay attention to warmth during the cold season to avoid chin tremors due to the cold in children. 3, sneezing: occasional sneezing in newborns is not a symptom of cold. Newborns with rich blood flow in the nasal cavity, narrow nasal cavity, short nasal face, and tiny outside substances such as cotton lint, fluff, dust, etc. can stimulate the nasal mucosa causing sneezing, and overflowing milk reflux into the nasal cavity can also cause sneezing. After a bath, children can be stimulated by cold air, which can also cause sneezing, so mothers need not worry, just pay attention to keeping warm, and do not take cold medicine at every turn. Warning: If you have a runny nose or cough, you should seek medical attention. 4, overflowing milk: the newborn’s stomach is “horizontal”. The cardia where the esophagus connects with the stomach and the pylorus where the stomach connects with the duodenum are almost at the same level. In addition, the capacity of the newborn’s stomach is small, and the cardia muscles are not yet well developed, so they do not close tightly, which can easily cause milk to flow backwards in the stomach. Especially when changing diapers immediately after feeding, crying or moving around, overflow will occur. Sometimes when bottle feeding milk or water, the nipple of the bottle is not completely filled, resulting in the child inhaling air, causing the stomach to expand and causing overflow. Warning: Milk overflow is different from spitting up. Spitting up more milk, like spraying out, is a pathological condition and should be seen by a doctor. Don’t change diapers immediately after feeding, don’t let the baby cry, and take the right side position to reduce milk spillage. 5. Vaginal bleeding in female babies: It is normal for female babies to have a little bloody vaginal discharge or mucus about a week after birth. This is because the fetus is subjected to the action of maternal estrogen and progesterone in the body. After birth, the level of estrogen drops rapidly, causing the uterus and vaginal epithelial tissue to fall off, which is medically known as “pseudomenstruation” and is a normal physiological phenomenon. Warning: pay attention to the hygiene of the vulva, use a small cotton swab with warm salt water to gently scrub. 6, breast enlargement: after the mother is pregnant, the body progesterone, prolactin and other content gradually increased, until the peak before delivery. These hormones can promote maternal breast development and milk secretion, and the fetus is affected through the placenta in the mother’s body. As a result some newborns develop enlarged breasts. After birth, the hormones from the mother disappear and the enlarged breasts fade away. Therefore parents should not be nervous. Warning: Do not squeeze the nipple to avoid infection.