It is not necessary to apply erythromycin ointment after the acne has broken. Erythromycin ointment belongs to a class of antibiotics and is usually applied before the acne has broken, at which time its application helps to eliminate local inflammation of the skin. Once the acne is broken and then used again, it has no effect in this regard. You can use iodophor or alcohol every day after the acne has broken to clean and disinfect the area. This will prevent fungus or bacteria from passing through the broken skin and causing a new inflammatory infection. You can also use some drugs for topical application to promote wound healing, clinically commonly used recombinant human epidermal growth factor, as well as recombinant bovine basic fibroblast growth factor gel. It is also important to note that the acne break must not be repeatedly squeezed or touch the wound.