Slapped Cheek Syndrome: Symptoms, Contagion and Pregnancy

Slapped Cheek Syndrome: Symptoms, Contagion and Pregnancy

Slapped cheek syndrome, also called fifth disease, is a common viral infection caused by parvovirus B19. It usually starts like a cold, then a bright red rash appears on the cheeks. Children are contagious before the rash shows, not after, so they can usually stay in school once it appears.

This guide is for parents, caregivers, teachers and pregnant people who want clear answers on symptoms, spread and when the infection needs medical attention.

Key takeaways

  • Slapped cheek syndrome is caused by parvovirus B19 and spreads through respiratory droplets from coughs, sneezes and close contact.
  • People are most contagious in the early cold-like phase and are no longer contagious once the facial rash appears, according to the CDC.
  • Roughly one in four people infected with parvovirus B19 have no symptoms at all.
  • About half of adults have antibodies by age 20 and more than 70% by age 40, so many pregnant people are already immune.
  • When a pregnant person is infected, the CDC puts the risk of a serious problem for the baby at 5% to 10%, highest between weeks 9 and 20.

What is slapped cheek syndrome?

Slapped cheek syndrome is the common name for the rash illness caused by parvovirus B19, a virus that infects humans only. It's sometimes called fifth disease because it was historically the fifth in a list of common childhood rash illnesses. The medical name is erythema infectiosum.

It's usually mild in healthy children. The CDC's parvovirus B19 overview notes that roughly one in four infected people have no symptoms, and that symptoms are usually mild when they do appear. Note that this virus is different from the parvovirus that affects dogs and cats; you can't catch it from pets or pass it to them.

Outbreaks come and go. The CDC issued a health advisory in August 2024 after a rise in activity. It reported that the share of people with markers of recent infection rose from under 3% in 2022 to 2024 to 10% in June 2024, and among children aged 5 to 9, from 15% to 40%.

What are the symptoms of slapped cheek syndrome?

The illness typically comes in two phases: a few days of mild cold-like symptoms, followed about a week later by the distinctive rash.

StageTimingWhat you may seeContagious?
Early phaseStarts about 7 days after infection and lasts about 5 daysHigh temperature, runny nose, sore throat, headache, aches, feeling unwellYes, most contagious now
Facial rashAbout 7 to 10 days after the early phaseBright red rash on one or both cheeks; may be less obvious on brown and black skinNo, contagiousness has passed
Body rash1 to 4 days after the face rashLacy or spotty, sometimes raised rash on chest, back, arms and legsNo
RecoveryRash usually fades within 1 to 3 weeksRash can flare again with heat or stressNo

Timings come from the CDC health advisory and the NHS guide to slapped cheek syndrome. The NHS says most children recover within three weeks. The CDC notes the body rash usually fades within 7 to 10 days but can come back for several weeks.

Symptoms in adults

Adults often skip the facial rash. Instead, they're more likely to get joint pain and stiffness, which the CDC says usually lasts 1 to 3 weeks but can persist for months. It tends to affect both sides of the body, most often the hands, feet and knees, and is most common in women. If you're an adult with lingering aches after a cold-like illness, our article on persistent flu-like symptoms and their hidden causes covers other possibilities worth discussing with a doctor.

How contagious is slapped cheek syndrome?

It's quite contagious before anyone knows it's there. By the time the rash appears, the person usually can't spread it.

Parvovirus B19 spreads through respiratory droplets. The CDC reports that household exposure infects about 50% of people who aren't already immune, and school outbreaks infect 20% to 50% of susceptible students and staff. It can also pass from a pregnant person to the baby, and very rarely through blood products.

Because spreading happens before the rash, the NHS says children do not need to stay off school or nursery once the rash has appeared, though you should let the school know. That helps staff alert pregnant colleagues and families of children with blood disorders.

Prevention is basic hygiene. There's no vaccine. The NHS recommends:

  • Washing hands often with soap and water
  • Using tissues to catch coughs and sneezes
  • Throwing used tissues away promptly

How do you treat slapped cheek syndrome at home?

There's no specific treatment, and most children don't need to see a doctor. Care focuses on comfort while the immune system clears the virus.

  1. Rest. Let your child take it easy while they feel unwell.
  2. Fluids. Offer plenty of drinks, and keep babies on their normal feeds.
  3. Pain and fever relief. Paracetamol (acetaminophen) or ibuprofen can help if your child is uncomfortable. Follow the dose on the pack for their age and weight.
  4. No aspirin under 16. The NHS says never give aspirin to children under 16.
  5. Itch care. For an itchy body rash, keep skin cool and moisturized, and ask a pharmacist about suitable options. Our guide to allergy causes and treatments can also help you tell a viral rash from an allergic one.
  6. Keep the school informed. Children can go back once they feel well enough, since the rash stage isn't contagious.

Antibiotics don't help, because this is a virus. Good sleep and balanced meals support recovery; for background on how the immune system fights infection, see our article on foods that support white blood cells.

Is slapped cheek syndrome dangerous in pregnancy?

Usually not, but it needs prompt attention. Most pregnant people are already immune, and most infections in pregnancy don't harm the baby. A small number lead to serious complications.

The CDC health advisory reports that about 50% of adults have detectable antibodies by age 20 and more than 70% by age 40. Antibodies from past infection are thought to protect against getting it again.

If a pregnant person who isn't immune does get infected, the CDC says the risk of an adverse outcome for the baby, such as fetal anemia, swelling called non-immune hydrops or pregnancy loss, is 5% to 10%. The risk is highest when infection happens between weeks 9 and 20. The CDC overview also notes that early pregnancy infection is linked to a slight increase in miscarriage risk.

What to do if you're pregnant and exposed:

  • Contact your midwife, obstetrician or GP promptly, even if you feel well.
  • Ask about a blood test to check whether you're already immune or recently infected.
  • If you are infected, your care team may monitor the baby with ultrasound scans for signs of anemia, which can be treated.

If you're managing pain or fever in pregnancy, ask your midwife which medicines to use; our article on acetaminophen use in pregnancy summarizes the current evidence. Rest matters too, and our comparison of pregnancy pillow types can help if illness disturbs your sleep.

Who is at higher risk of complications?

Some people can develop severe anemia, a dangerous drop in red blood cells, because the virus temporarily stops the bone marrow from making new red cells.

GroupWhy they are at risk
Pregnant peopleThe virus can infect the baby and cause anemia or hydrops
People with sickle cell disease, thalassemia or hereditary spherocytosisTheir red cells already break down quickly, so a pause in production can cause a sudden, severe crisis
People with weakened immune systemsLeukemia and other cancers, chemotherapy, organ transplants or HIV can make infection long-lasting

The CDC lists these groups in both its overview and health advisory, and notes that transfusions and intravenous immunoglobulin are the main treatments for severe anemia caused by the virus.

Common mistakes

Parents and schools sometimes handle slapped cheek syndrome in ways that don't match how it spreads.

  • Keeping a child home once the rash appears. By then they aren't contagious. The time they spread it was the earlier cold-like phase.
  • Not telling the school. Staff need to know so pregnant colleagues and vulnerable children can get advice.
  • Mistaking the rash for an allergy or sunburn. The rash can look dramatic and flare in heat or stress, but it's harmless in healthy children.
  • Giving aspirin. Use paracetamol or ibuprofen instead for children.
  • Assuming it's always a child's illness. Adults catch it too, often with joint pain and no face rash.

When to see a doctor

Most children recover at home. Contact a doctor or midwife if any of the following apply.

  • You're pregnant and have been around someone with slapped cheek syndrome, or you have symptoms
  • You or your child have a blood disorder such as sickle cell disease or thalassemia
  • You or your child have a weakened immune system, for example from chemotherapy, leukemia or HIV
  • Symptoms aren't improving after three weeks, or joint pain lasts for weeks

Get urgent help if someone has very pale skin, shortness of breath, extreme tiredness or has fainted. The NHS says these can be signs of severe anemia, which may need a blood transfusion. In the UK, call 111; elsewhere, contact urgent care or emergency services. Also seek urgent care for a rash that doesn't fade when pressed under a glass, as that may signal a different, serious illness.

Frequently asked questions

Can my child go to school with slapped cheek syndrome?

Yes, in most cases. The NHS says children don't need to stay off school once the rash appears, because they're no longer contagious by then. Keep them home if they feel too unwell or have a fever. Tell the school, so staff can alert anyone pregnant or with a blood disorder who may have been exposed earlier.

How long is slapped cheek syndrome contagious?

People are most contagious during the early cold-like phase, which starts about a week after infection and lasts around five days, according to the CDC. Viral levels fall before the facial rash appears, and once it does, the person is no longer contagious. That's why the illness spreads easily before anyone realizes what it is.

Can you get slapped cheek syndrome twice?

It's uncommon. The CDC says antibodies from a previous infection are thought to protect against reinfection. Many adults have already had it, often without knowing, which is why about half have antibodies by 20 and more than 70% by 40. A blood test can confirm immunity, which is especially useful in pregnancy.

Is slapped cheek syndrome the same as hand, foot and mouth disease?

No. Slapped cheek syndrome is caused by parvovirus B19 and mainly causes a red facial rash and a lacy body rash. Hand, foot and mouth disease is caused by different viruses and typically causes mouth sores and spots on the hands and feet. Both are common in young children, and a doctor can help if you're unsure which it is.

What to do next

  1. If your child has the facial rash and feels well, send them to school and let staff know.
  2. If you're pregnant and exposed, call your midwife or doctor today and ask about an immunity blood test.
  3. If anyone in the household has a blood disorder or weakened immunity, contact their care team promptly.
  4. Reinforce handwashing and tissue habits at home, which also cut the spread of other childhood infections such as those in our guide to why pinworm infections keep coming back.

This article is for general information and is not medical advice. Contact a healthcare professional about your own situation.

Sources

Last reviewed: October 2026.

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