umbilical area
This is called the pyloric region. A sphincter called the pyloric sphincter is found there.
Abdomen
Umbilical Knot 'Navel' is more common The "Navel" is the area around the "belly button"
Umbilical knot
A belly button ring is a body piercing placed in a cauterized area of the belly button.
Umbilical Hernia. Not particularly dangerous, but get it checked out. You'll experience soreness and tenderness around the belly button area, and it's possible your belly button might swell and protrude a little. Usually results from injury or impact to the area.
belly button
The belly of a person or animal is typically considered to be their general abdominal area. This is on the front of bipedal animals in the area around their belly button or pouch and on the bottom of quadripedal animals.
A belly piercing is a piercing on the belly button. Where your belly button might go in or out, it is the slight arch you get just above it. it is a piercing through that area. depending on how your belly button is formed. Search google for images.
I wish I had a definite answer for you. I'm five weeks today and my belly button is killing me! With my last three pregnancies it was inside the belly button, this one its the area all around the belly button...
If you pick at your belly button that is probably the cause, it is most likely just bruised. If you dont pick at it then you should probably see your doctor as it could be an infection ir hernia.
The navel.