Belly button inflammation symptoms are mild when coated with erythromycin generally does not lead to more serious; but if the purulent infection, and then coated with erythromycin may lead to more serious; fungal infections caused by the belly button inflammation coated with erythromycin may also be more serious, but is not caused by the drug. Causes of navel inflammation more causes, due to the navel depression easy to hide dirt, easy to breed bacteria caused by navel infection inflammation, navel fistula can also cause navel infection. The use of drugs need to be based on the specific causes of the selection of appropriate medication, so as not to cause adverse consequences. If the umbilical cord bacterial infection is light for the local redness and swelling and less oozing, you can apply erythromycin ointment locally, this time generally does not lead to a more serious condition. However, if a serious purulent infection of the navel has occurred, it is not suitable for local application of erythromycin ointment. Since erythromycin ointment is a cream that may block the fistula when applied, the infection may worsen and should be treated with incision and drainage as determined by the specific condition. Erythromycin ointment is not effective in treating inflammation of the navel due to fungal infection. Therefore, topical erythromycin may also lead to a more serious condition in case of fungal infections, but this is not caused by the medication, but rather by the fact that the disease has not been treated appropriately. It should also be noted that the drug should be applied under the guidance of a doctor, erythromycin ointment has an allergic reaction, and if the affected area develops itching and burning pain after use, you need to stop using the drug immediately.