Hello And Good Afternoon, My Husband Has A Ingrown Hair

Hello and good afternoon, my husband has a ingrown hair on hip top lip that started out as a small red bump and he made the mistake and squeezed it woke up the next morning to a very painful oversized top lip ..He went to the dermatologist and they prescribed antibiotics and mupirocin and my question is can this oniment be put on the open area that is draining ...