Impetigo a skin infection caused by the staphylococcus or, less often, by the streptococcus bacterium. Pustules develop on this area, soon forming crusty, yellow-brown sores that can spread to cover entire areas of the face, arms, and other body parts. Yes my initial thought was that she would have contracted it during oral sex, because i have recently had the sores on my lip i am just unsure what these sores on my lip were, if they were the second coming of impetigo or if i contracted the cold sore virus from somewhere and passed it along, we have both been on antibiotics for impetigo in the past, but we have yet to see a doctor about all. Impetigo is a highly contagious bacterial skin infection that is characterized by red sores on the face, particularly around the mouth and nose. Ii accounts for about 10 percent of skin problems observed in pediatric clinics. Horrible looking reddish, pinkish sores and blisters rounding the mouth and nostril holes. Treatment for boils on neck, thigh, skin, vagina, back, face and under arms. Impetigo is generally thought to be contagious during the first 24 hours of appropriate antibiotic therapy. If impetigo is caused by streptococci bacteria it iscontagious for about one to three days. If impetigo is caused by staphylococci bacteria it is contagious for about four to 10 days. Impetigo is spread rimarily from direct contact with someone who has it, but sometimes from towels. Impetigo is a contagious bacterial skin infection that causes a blistering skin rash and, in rare cases, scarring. Most cases resolve without treatment but some need antibiotics. Learn about the symptoms, treatment and when to seek medical advice here - using content verified by certified doctors. Impetigo is a common skin infection that may be caused by either staphylococcus or streptococcus bacteria. Children are more likely to be affected by the condition than adults. Impetigo starts as red blisters that later erupt and form yellow, crusty sores. Impetigo sores can appear anywhere on the body, but children tend to get them on their face. Herpes and impetigo are two medical conditions that are extremely common. Both cause painful sores to develop, but on different parts of the body. Some people may not be sure whether they have develop impetigo or herpes when blisters show up.