The presence of warts on the breast area can usually be treated with topical as well as systemic medications. There are a number of options for topical medications, usually exfoliative or cytotoxic, but these can be irritating to normal skin and should be applied only to the warts. Drugs that can be used include 3% reserpine solution applied externally 1-2 times per day, or 0.5% tincture of onychomycetin applied externally twice per day, as well as 0.025% retinoic acid ointment applied externally twice per day or 3% phthalidomide ointment applied once per day in the evening. In terms of antiviral ointments, you can choose imiquimod ointment twice daily to apply foam.