Impetigo is a skin infection caused by group A Streptococcus. It starts as a discolored pimple, &lt;a href=&amp;quot;http://www.nationwidechildrens.org/impetigo&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;&amp;gt; according to Nationwide Children&amp;39;s Hospital &
Impetigo is a skin infection caused by group A Streptococcus. It starts as a discolored pimple, &amp;lt;a href=&amp;quot;http://www.nationwidechildrens.org/impetigo&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;according to Nationwide Children&amp;#39;s Hospital&amp;lt;/a&amp;gt;, and small blisters or scabs form and break. A doctor might treat it with antibiotic ointment.