From wikipedia:
Impetigo is a superficial skin infection most common among children age 2–6 years and is also prone to people who play close contact sports such as
football and
wrestling, regardless of age.
Impetigo is usually caused by the same
streptococcus strain that causes
strep throat,
Streptococcus pyogenes; it may also be caused by
Staphylococcus aureus.
Scratching may spread the
lesions.
The
infection is spread by direct contact with lesions or with nasal carriers. The
incubation period is 1–3 days. Dried streptococci in the air are not infectious to intact skin.
One or more
pimple-like lesions surrounded by reddened skin. Lesions fill with
pus, then break down over 4–6 days and form a thick crust. Impetigo is often associated with insect bites, cuts, and other forms of
trauma to the skin. Itching is common.
People who suffer from
cold sores have shown higher chances of suffering from impetigo. Those who normally suffer from cold sores should consult a doctor if normal treatment has no effect.
Mediocrity always discriminates excellance.