Slapped cheek syndrome, also known as fifth disease, is a common contagious viral infection that usually affects children between the ages of three and 15, although it can strike people of all ages. It occurs most often in winter and spring and is caused by parvovirus B19. There are so few symptoms that lots of cases go completely unnoticed, although it's thought to be very common, and once you've had it, you have lifelong immunity against the virus that causes it. Up to 80% of adults in the US are thought to have immunity from a previous infection with parvovirus B19.

It's caught by inhaling airborne droplets of saliva from other people's coughs and sneezes.

There's an increased risk of miscarriage if the disease is caught in pregnancy as it can cause severe anaemia in unborn babies, and moms-to-be who contract the disease may need hospitalization so their babies can be treated in the womb.

What are the symptoms of Slapped cheek syndrome?

There's an incubation period of around 14 to 18 days before symptoms of slapped cheek syndrome first appear. They usually emerge in a set pattern, starting with a fever (temperature of 100°F or above), sore throat, upset tummy, headache and itchy skin. This is when the disease is most infectious.

A few days to a week later, the rash appears over both cheeks, as if they've been slapped. Then, up to four days later, the rash will spread across the chest, abdomen, arms and thighs. It can be very itchy and uncomfortable, and is usually raised.

In adults, the main symptoms are aches, pains and stiffness of the joints, especially knees, wrists and ankles. This can last for months or, in rarer cases, years. Only about 50% of adults have the rash, and there are usually none of the other symptoms.

If you're pregnant and you think you have symptoms contact your doctor straight away.

What are the treatments and remedies of Slapped cheek syndrome?

There's usually no treatment for slapped cheek syndrome, except for home treatments such as paracetamol or ibuprofen to bring the temperature down. Symptoms in children can persist for up to five weeks.

Certain vulnerable groups of people may need specialized medical treatment, however. These include people with certain blood disorders, who may need a blood transfusion, as it can destroy red blood cells, and those with lowered immunity, who may need an injection of antibodies from a donor with immunity to the disease to prevent complications.

Pregnant women may be admitted to hospital so their unborn babies can be given a blood transfusion in the womb.

You should contact your doctor immediately if you think you may have slapped cheek disease and you fall into any of these 'at risk' groups.

This guide

This article is not meant to substitute medical advice provided by a practicing medical professional - if you have any concerns, contact your physician immediately.