For the baby navel black black situation, this is due to the formation of local metabolic waste, can give water cleaning, massage oil softening cleaning and so on way to relieve. 1. water cleaning: avoid picking out with your fingers, if the baby navel area of dirt less, you can choose to use water cleaning, but pay attention to the control of the water temperature, need to be controlled at 40 degrees or less, through the local cleaning of the navel area of the dirt, you can achieve a better cleaning effect. 2. Massage oil softening cleaning: If the baby navel part of the dirt is more, and with the skin adhesion is more dense, in this case you can choose to massage oil coating, can effectively soften the local dirt, and then use warm water for cleaning, can be very good to remove. After cleaning off the dirt in the navel area of the baby, in order to prevent infection, you also need to take iodine povine for local application, can also achieve the role of cleaning and disinfection, avoid forcibly removed to the child, so as not to produce damage.