The first symptoms of impetigo are discolored sores on your skin, often clustered around your nose and lips ... of impetigo based on the bacteria that cause them and the sores that form.

Impetigo is a skin infection caused by a bacterium; the staphylococcus as in your son's case or the streptococcus are the main culprits. It usually starts as small ... in his nose but if he ...