Rare genetic traits like an inverted navel can be really odd to see among adults. However, they are not exactly crazy to see among young children. Children that are newborns all the way up to a few years old may have what is commonly called an “outie belly button.” Of course, the true name for this is an inverted navel, but most people do not know the true medical term for it. Most children who have an inverted naval will eventually see it sink in to look normal.
[Image via Healthline]Although, it can last for others into their teenage years. It does usually go away before that timeframe, but the cases change often depending on the size of the person. While some believe that the naval being inverted or not is determined by how the umbilical cord is cut, this is not the case. How the scar heals there afterward is really the biggest factor. Sometimes, the child might even have a small hernia at birth that causes it too. Today, only 10% of adults have any form of inverted naval.