My baby 1 month, we are in a hurry. Later, we listened to the doctor's advice and made an elastic band with a coin of 1 yuan in the middle. The coin is wrapped in cotton cloth and placed on the baby's stomach, and the coin is pressed on the navel. The elastic band should not be too loose. It doesn't matter if the baby has little red dot on his stomach. Don't be afraid to hurt the baby, otherwise it's useless. If the navel keeps protruding like this, the baby will have an operation. We used elastic belt for about a month, and the baby's navel gradually sank. My baby is 4 months old now, and the navel is well developed.