The umbilical cord of a newborn baby usually falls off when it is about a week old, and care should be taken to disinfect it within a week. Generally disinfect it with hydrogen peroxide and soak it until the umbilical cord does not foam up. The umbilical cord must be soaked thoroughly, and the bottom of the cord must be soaked before it falls off. After soaking in hydrogen peroxide until it does not foam, disinfect it thoroughly with iodine volts, about 2-3 times a day. During this period, if the umbilical cord is found to have fluid, pus, redness around the umbilical cord, and warmth of the surrounding skin, you need to seek medical attention promptly. Because it is if it causes umbilical infection, the child will have more serious systemic manifestations, so it must be disinfected well. Even if the umbilical cord has not fallen off for a week and the child is generally in good condition with no inflammatory manifestations such as redness, swelling, heat and pain, there is no problem.