Babies are born crying, and during the process of raising them, they often use crying to express their little emotions. Mothers have become accustomed to these cries, and if one day the baby starts laughing, mothers will be surprised. So why does the baby laugh?
A baby's smile may appear in the following situations:
1. During the sleep process of adults, there may be light and deep sleep. Studies have found that babies exhibit these characteristics at a very young age. After a period of sleep, babies will enter the light sleep stage. One of the major characteristics of the light sleep stage is that babies will make various movements, and even make sounds. Sometimes babies' faces will make smiling movements, which are all involuntary behaviors.
2. If a baby is around one year old, their brain has undergone significant changes since birth and they begin to dream. Like adults, babies occasionally smile during the process of dreaming, perhaps because they dream of having delicious food or because their mothers bring them new toys.
3. After a few months of birth, babies can clearly recognize their mothers. If mothers take good care of their babies, babies will develop a sense of dependence and security towards their mothers, and they will show some smiles on their faces when facing their mothers. When mothers perform specific actions such as breastfeeding, holding toys, etc., babies love them and will also smile when they see them.
