Causes
Impetigo is an infection caused by strains of staph or strep bacteria. These bacteria can get into your body through a break in the skin from a cut, scratch, insect bite, or rash. Then they can invade and colonize.
The condition can be contagious. You can catch these bacteria if you touch the sores of a person with impetigo or you touch items like towels, clothes, or sheets that the person used.
However, these bacteria are also common in our environment, and most people who come in contact with them won’t necessarily develop impetigo.
Some people normally carry staph bacteria on the inside of their nose. They may get infected if the bacteria spreads to their skin
Impetigo on adults
Although impetigo is more common in young children, adults can get it too. Because it’s so contagious, impetigo can spread through any close contact. Adults who play sports often catch it from skin-to-skin contact.
The symptoms of impetigo in adults are sores around the nose and mouth or other exposed areas of the body that break open, ooze, and then crust.
Generally, impetigo is a mild skin condition, but adults have a higher risk of complications than children. These include:
acute post-streptococcal glomerulonephritis
cellulitis
lymphangitis
sepsis