These small gaps are made of connective tissue.
They allow the brain to grow and develop before the skull bones fuse together.
Each has a distinct shape and size.
Verywell / Danie Drankwalter
Certain conditions can change the appearance of the soft spots, which may indicate abnormalities in development.
However, a change in appearance can be temporary and normal.
As the brain and skull develop, the skull bones come together, and the soft spots go away.
In fact, research has shown that there are racial and ethnic differences in the sizes of soft spots.
When Do Soft Spots Close?
A noticeable change in appearance or size may indicate a medical condition.
For example:
These conditions can be assessed through physical exams and lab tests.
Caring for the Soft Spots
Caring for soft spots is not complicated.
In general, leaving them alone is best.
However, there are some signs to look out for to help monitor healthy growth and development.
Concerns
Soft spots are normal and tell us that the brain has room to grow and develop.
By knowing what is expected and when, you could better understand your baby’s development.
Remember, there is a general range for size and closure of soft spots.
Your doctor can help rule out other causes and provide guidance on treatment, if needed.
Frequently Asked Questions
When do a baby’s soft spots close?
Why do babies have soft spots?
Babies have soft spots for two main reasons.
The first is to provide flexibility, allowing the head to fit through the birth canal.
The second reason is to give the brain, which grows considerably in infancy, room to expand.
What happens if my baby’s soft spot closes early?
Remember, there is no hard and fast date on when your babys soft spots should close.
Rather, it is a range.
It is best to speak to your pediatrician if it seems the soft spot is closing too early.
When should you worry about your baby’s soft spot?
These can be signs of dehydration, a recent fall, fluid buildup, or something else concerning.
Gently touching and feeling a babys soft spots will not hurt them or their brain.
If you notice any changes to your baby’s fontanels between regular checkups, reach out to your doctor.
It’s likely your pediatrician will give you the added peace of mind you need.
Lipsett B, Reddy V, Steanson K.Anatomy, head and neck, fontanelles.
2015;9(4):15-23.
