Why has the umbilical cord not fallen off after 21 days?

Patient's question:

No

Doctor's answer:

The umbilical cord of a newborn usually falls off within 7-10 days after being tied, forming an umbilical stump. The key to care is to maintain cleanliness around the umbilical cord every day, disinfect it with 75% alcohol, and then apply 1-2% gentian violet until the cord falls off. The child needs to be moisturized with alcohol or gentian violet to promote the falling off.