Newborn babies seem to like to cry and laugh. In fact, babies’ laughter and crying have different meanings. So, what are the meanings of a baby's smile? What do they all represent? Let's take a look! 1. The baby will smile from birth. His first smile is spontaneous and will not be affected by the outside world. Babies mostly smile in sleep during the first 1-2 weeks after birth, and the corners of their mouths will turn up slightly when they laugh. 2. Three weeks after your baby is born, if you gently touch his cheeks with your hands or other soft objects, or gently blow his skin with your mouth, your baby may smile. This kind of smile is a conscious smile of a baby, but also a satisfied smile. At this time, the upward angles of the baby's mouth are symmetrical. If the baby's mouth is only tilted to one side, it is necessary to pay attention to whether it is suffering from neuroplegia. 3. When the baby is four weeks old, he will smile when he hears the mother's voice. If he is breastfeeding at this time, he may stop breastfeeding. This shows that the baby's hearing is normal and the development of consciousness is clear. 4. When the baby is five weeks old, many small stimuli may cause the baby to smile. For example, when mom and dad continuously nod their heads at the baby, when the baby pats each other with his hands. These indicate that the baby's visual and tactile development are normal. If the baby's response is not very timely, he should go to the hospital for examination in time to see if there is any developmental problem. 5. Four months after the baby was born, he was able to make laughter similar to 'chucklingIf the baby does not laugh until five months later, it may be that the baby's brain development is abnormal, or even mentally low. Every little baby's expression to the outside world, whether it is crying or smiling, has its own meaning, and more often it can reflect some of the baby's development. Therefore, mom and dad should take care of the baby carefully, and seek medical treatment in time if they find something unreasonable. Previous article: Inheriting the customs of Qingming Festival and carrying forward traditional culture Next article: How many mysteries are in a small piece of diapers?