Impetigo is a common type of skin infection. Picking at sores or scratching
itchy bites may allow the bacteria which cause impetigo to enter the skin.
- Bacteria may enter through some sort of break in the skin. Typically
the break in the skin is obvious (such as a skinned knee or a
cut or even
an insect bite), but even very small, microscopic breaks may allow for
bacteria to enter.
- Once the bacteria get into the inner layers of the
skin, they grow and multiply, creating a blister. Usually, this blister
becomes filled with pus and bursts, leaving a crust. It is this blistering
and crusting which is typical of impetigo.
- There are two common forms of impetigo, referred to as bullous and nonbullous.
- Bullous impetigo is less common and is only caused by staphylococci. Typically this form results in the formation of larger blisters.
- Nonbullous impetigo is most common and is generally caused by a mild traumatic break in the skin and can be caused by two types of bacteria,
streptococci or staphylococci. It results in the formation of smaller blisters.
Medically Reviewed by a Doctor on 7/22/2014
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