Patient's question:
Sure, here is the translation of the content you provided:```
No
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Doctor's answer:
Hello. After the umbilical cord falls off, the umbilical area is not exactly the same for every baby. Some may protrude slightly, while others may indent slightly. As long as the umbilical area does not protrude when the baby cries, strains, or has a bowel movement, it is considered normal. Protrusion during crying is known as an umbilical hernia. The black substance in the navel is left over from incomplete cleaning. As long as parents clean it off each time the baby takes a bath, the blackness will not be very noticeable.