Dirt on the belly button should not be picked off. The belly button is a depression in the middle of the human abdomen. This is easy to accumulate dirt, resulting in a higher number of flora per unit area of the epidermis, which is prone to infections and lesions. Finger picking the navel, easy to make the navel inside the skin by the fingernail scratches, breaks lead to the loss of the skin barrier function, so that the navel bacteria invasion triggered by infection navel inflammation, so it is not recommended to pick the navel in the dirty things. However, the navel of the dirty things can be softened with saline, and then clean cotton swabs dipped in povidone-iodine, gently rotating, cleaning the dirt in the navel, both disinfectant effect, but also reduce the navel damage. Note that the dirt on the navel can not be directly with the hand to pick, in the use of cotton swabs should also pay attention to the strength, in order to avoid damage.