Disease analysis: Hello! The navel is the only acupoint in the human body that can be touched by hand and seen by eyes, and it is called Shenque. Shenque point is a channel for the fetus to get nutrition from the mother before death. During embryonic development, it is directly connected with the abdominal wall. Drugs easily pass through the navel, enter the intercellular substance, and quickly distribute in the blood. Moreover, it has internal relations with the twelve meridians, viscera, limbs, five palaces, bones and muscles, and so on, so it has always been regarded as an important acupoint for treating diseases by physicians.

Suggestion: The depression and bulge of navel are related to the length of umbilical cord cut at birth. Umbilical cord is easy to protrude if it is placed for a long time, otherwise it is easy to sag.