Impetigo
Impetigo is a common and highly contagious skin infectionthat causes sores and blisters. It's not usually serious and often improves within a week of treatment or within a few weeks without treatment.
Impetigois the most common skin infection in young children in the UK, but it can affect people of all ages.
This topic covers:
When to seek medical advice
Causes
Treatment
Preventing the spread of impetigo
Preventing recurrent impetigo
Complications
There are two types of impetigo:
The symptoms ofboth typesare describedbelow.
The symptoms of non-bullous impetigo begin with the appearance of red sores usually around the nose and mouth but other areas of the face and the limbs can also be affected.
The sores quickly burst leaving behind thick, golden crusts typically around 2cm across. The appearance of these crusts is sometimes likened to cornflakes stuck to the skin.
After the crusts dry, they leave a red mark that usually fades without scarring. The time it takes for the redness to disappear can vary between a few days and a few weeks.
The sores aren't painful, but they may be itchy. It's important not to touch or scratch the sores because this can spread the infection to other parts of the body, and to other people.
Other symptoms, such as a high temperature (fever) and swollen glands , are rare but can occur in more severe cases.
The symptoms of bullous impetigo begin with the appearance of fluid-filled blisters (bullae) which usually occur on the central part of the body between the waist and neck, or on the arms and legs. The blisters are usually about 1-2cm across.
The blisters may quickly spread, before bursting after several days to leave a yellow crust that usually heals without leaving any scarring.
The blisters may be painful and the area of skin surrounding them may be itchy. As with non-bullous impetigo, it's important not totouch or scratch the affected areas of the skin.
Symptoms of fever and swollen glands are more common in cases of bullous impetigo.
Speak to your GP if you think you or your child may have symptoms of impetigo.
Impetigo isn't usually serious, but it can sometimes have similar symptoms to more serious conditions such as cellulitis (an infection of the deeper layers of skin) so it's important to get a correct diagnosis.
Your GP can also prescribe treatment to help clear up the infection more quickly than if itwas left untreated.
Impetigo occurs when the skin becomes infected with bacteria, usually either Staphylococcus aureus or Streptococcus pyogenes.
The bacteria can infect the skin in two main ways:
The bacteria can be spread easily through close contact with someone who has the infection, such as through direct physical contact, or by sharing towels or flannels.
As the condition doesn't cause any symptoms until four to 10 days after initial exposure to the bacteria, it's often easily spread to others unintentionally.
Children and peoplewith diabetes or a weakened immune system either due to a condition such as HIV or a treatment such as chemotherapy are most at risk of developing impetigo.
Impetigousually gets better without treatment in around two to three weeks.
However, treatment is often recommended because it can reduce the length of the illness to around seven to 10 days and canlower therisk of the infection being spread to others.
The main treatments prescribed are antibiotic creams or antibiotic tablets. These usually have to be used for around a week.
Read about treating impetigo .
During treatment, it's important to take precautions to minimise the risk of impetigo spreading to other people or to other areas of the body.
Most people are no longer contagious after 48 hours of treatment or once their sores have dried and healed. It's important tostay away from work, school, nursery or playgroup until thispoint.
The advice below can alsohelp to prevent the spread of the infection:
If you think that the infection has spread to someone else, make sure they're seen by a GP as soon as possible.
Toreduce the risk of impetigo returning, make sure any cuts, scratches or bites are kept clean. Ensure any condition that causes broken skin, such as eczema , is treated promptly.
If you develop impetigo frequently, your doctor may suggest taking a swab from around your nose to see if you carry staphylococcal bacteria. These bacteria can live in the noses of some people without causing problems, although they can lead to impetigo if they infect broken skin nearby.
If you're found to carry these bacteria,you may be prescribed an antisepticnasal cream to apply several times a day for five to 10 days in an attempt to clear the bacteria and reduce the chances of impetigo recurring.
Complications of impetigo are rare, but they can sometimes occur and can be serious. Tell your GPif you have impetigo and your symptoms change or get worse.
Some complications associated with impetigo include:
In very rare cases,impetigo may lead to some scarring , particularly if you scratch at the blisters, crusts or sores.
Read about impetigo, a common and highly contagious skin infection that causes sores and blisters. It's not usually serious and often improves within a week of treatment.
Read about treating impetigo. It often clears up without treatment after two to three weeks. However, you should visit your GP to rule out other infections.
When Marilyns son had to be treated for impetigo at the age of nine, she thought that would be the end of it.