Erythromycin ointment is usually used in children, as the skin of children with burns can become red and easily infected, so it can be applied to protect the wound and help prevent infection. Erythromycin ointment can also be applied to children with skin boils, as they are mostly caused by bacterial infections, which can lead to localized redness and swelling of the skin, and applying erythromycin ointment can better improve inflammatory reactions such as redness, swelling, heat and pain.