Bacterial infections occur when bacteria already present in the skin proliferate in excess or when there is an infection caused by different bacteria.
Skin sites as nostrils, ears, bellybutton, genitals, armpits and under the nails of the hands have a greater number of bacteria, and therefore, should be particularly taken care. Impetigo is a common infection particularly in children. Another is the furuncle, which may recur many times in the same person and in people living nearby. In this case, besides treating the patient it is important to treat the skin sites that naturally have high bacterial counts, in people that live in the same house or have intimal physical contact with the affected patient, as they may be asymptomatic carriers of the bacteria and work as vector for infection.