The fontanel is a cranial cavity formed by incomplete combination of cranial suture in infants, which is divided into anterior fontanel and posterior fontanel. The rear fontanel is close to the headrest, which is a triangular gap formed by the bone seam between the parietal bone and occipital bone on both sides.

Under normal circumstances, the fontanel is very small or closed after birth, which can only accommodate the size of a fingertip, and it will be closed at the latest 6-8 weeks after birth. You can touch back along the midline of the head, and the place about 3-4 cm above the ear is where the back fontanel is located. Generally speaking, the meaning of the former is greater than that of the latter.

Extended data

Genmen sag

The most common thing is that the baby lacks water. If you don't replenish water in time after diarrhea, you need to replenish liquid to your baby immediately. For various reasons, large doses of dehydrating agent are used to reduce intracranial pressure, and the anterior fontanel can also be depressed due to dehydration.

The baby's body should replenish necessary water in time to prevent excessive dehydration from causing metabolic disorder in the body; Babies with malnutrition or chronic diarrhea caused by long-term insufficient intake often have obvious depressions in the front fontanel.

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