Why does the baby yawn and shed tears?

For a family, the baby's healthy growth is the most important thing. Because the baby's body is small and the immunity is not very strong, more attention should be paid to the baby's various symptoms. Some parents will find that the baby sheds tears when yawning, so what's going on? Next, let’s ask an authoritative expert to explain it to you.

Normally, when you yawn, your mouth opens very wide, allowing as much air as possible to be exhaled from the body in order to exhale carbon dioxide and inhale oxygen. As you yawn, a stream of air is exhaled forcefully from your mouth. The muscles in the cheeks, tongue, and throat tense and contract, increasing pressure in the mouth and nasal cavity. The increased nasal pressure will temporarily block the nasolacrimal duct from draining tears. The "sewer" is blocked, the tears cannot flow down, and more and more tears accumulate in the eyes. Your eyes will be filled with tears, and finally the tears will burst out and flow down your face.

Human tears are secreted all the time and flow on the surface of the eyeball. However, the tears secreted normally are very little, and they flow along the surface of the eyeball and in the tiny gaps inside the eyelids, so you don't feel the tears flowing.

However, in the split second you blink, the tears on the surface of the eyeball are sucked into the tear sewer - the nasolacrimal duct. Don't underestimate this thin tube, it is the only way for tears to reach the nasal cavity. The lacrimal glands continuously secrete tears, and the nasolacrimal ducts continuously discharge tears, so people do not normally shed tears.

The above is the relevant article about babies yawning and crying. After reading the above article, I believe everyone should have some understanding of this phenomenon of babies. Children need the care of their parents the most when they are infants, so parents must be patient and careful.