Thanks for posting your query.
The skin can be a birth defect
and can be associated with other significant internal problems of anatomical defects. I would suggest you to get significant structural problems first.
If there is no other congenital anomaly then you can wait to see if the problem resolves if not then you should wait till the child is of school going age.
You can get it corrected anytime you want but right now the baby is too small for that pain.
Hope I have answered your query.
If you have any questions I will be happy to answer.
Please close the query if you have no other questions.
Wish you a good health.