Emotional tears contain more protein compared to other types of tears, causing them to flow more slowly down the cheeks, thereby providing a visual display of one’s emotions.
An increasing number of schools and companies in Japan encourage their students and employees to cry as a way of relieving stress and improving mental health. There are also people who are called “namida sensei” meaning “tears teacher”.
Crying when you are happy is your body’s way of neutralizing your emotions so you don’t become overwhelmed with feelings. Responding to positive emotions with negative reactions (or vise versa) helps restore your emotional equilibrium.