Scarlet Fever in Children: Symptoms, Treatment, and Contagion

Your child has developed a fever, a sore throat, and a strange sandpaper-like rash on their body. Could it be scarlet fever? This childhood illness sounds alarming, but with proper treatment it is generally harmless and clears up quickly.

Scarlet fever primarily affects children between 3 and 12 years old and is caused by the same bacteria responsible for strep throat. In this guide you'll find everything you need to know about symptoms, treatment, contagion, and when your child can return to daycare — based on guidelines from the WHO and the American Academy of Pediatrics (AAP).

What Is Scarlet Fever?

Scarlet fever (scarlatina) is an infection caused by Group A streptococcus (GAS, Streptococcus pyogenes). The disease occurs when streptococcal bacteria produce special toxins (pyrogenic exotoxins) that cause the characteristic rash.

Scarlet fever almost always begins as strep throat with streptococcal bacteria, but with an added element: the rash. The same bacteria that cause ordinary strep throat trigger an immune reaction in the skin in some children.

The disease was once feared as a serious childhood illness, but with modern antibiotics scarlet fever is now a readily treatable condition. The vast majority of children recover without complications.

Symptoms of Scarlet Fever

Symptoms of scarlet fever develop quickly — often within a few hours. Here is the typical progression:

First Signs (Day 1)

• Sudden high fever — often 101–104°F (38.5–40°C)
• Severe sore throat — painful to swallow, red and swollen tonsils
• Headache and general feeling of illness
• Nausea and vomiting — common in children at the onset
• Swollen, tender lymph nodes in the neck

The Rash (12–48 Hours After Fever)

The rash is the most characteristic sign of scarlet fever:

• Fine, red rash that feels like sandpaper to the touch
• Usually starts on the chest and abdomen, then spreads to the rest of the body
• Intense redness in skin folds — especially in the armpits, groin, and elbow creases (Pastia's lines)
• Pale area around the mouth — redness on the face but a distinct paleness around the mouth and nose
• The rash reaches maximum extent after about 2 days and fades after 4–5 days

Strawberry Tongue

Another classic sign is the so-called strawberry tongue:

• Early in the illness, the tongue may have a whitish coating
• After a few days, the tongue becomes bright red with prominent, enlarged papillae — resembling the surface of a strawberry
• Strawberry tongue is a typical sign that can help the doctor make the diagnosis

Peeling (1–2 Weeks Later)

After the rash has disappeared, skin peeling begins:

• Skin peeling on the hands, feet, and fingertips
• Peeling may also occur on the chest, abdomen, and in areas where the rash was most pronounced
• The peeling is harmless and can last several weeks

How Does Scarlet Fever Spread?

Scarlet fever spreads the same way as other streptococcal infections:

Routes of Transmission

• Droplet transmission — coughing, sneezing, and talking spread bacteria via respiratory secretions
• Direct contact — close contact with an infected person
• Indirect contact — via contaminated toys, utensils, or surfaces at daycare

Incubation Period

The incubation period is short — typically 1–3 days. This means your child can become ill as soon as the day after exposure to the bacteria.

How Long Is the Child Contagious?

• Untreated: The child is contagious for 10–20 days
• With antibiotics: Contagiousness drops dramatically after just 1 day of antibiotic treatment

Antibiotic Treatment

Scarlet fever is always treated with antibiotics. Treatment shortens the course of the illness, reduces contagiousness, and prevents complications.

Standard Treatment

According to AAP guidelines, the treatment is:

• Penicillin V (phenoxymethylpenicillin) is the first choice
• Dosing under 88 lbs (40 kg): 10 mg/kg four times daily
• Dosing over 88 lbs (40 kg): 660 mg four times daily
• Duration: 5 days (may be extended to 10 days for recurring infections)

If Allergic to Penicillin

If your child is allergic to penicillin, alternative antibiotics are available. Speak with your doctor about this.

Important Points About Treatment

• Start quickly — the earlier treatment begins, the faster your child recovers
• Complete the full course — even if your child feels well after 1–2 days, it is important to finish
• Stopping early increases the risk of relapse and complications
• Most children notice clear improvement within 24–48 hours of starting treatment

Symptom Relief

In addition to antibiotics, you can ease your child's discomfort:

• Acetaminophen (Tylenol) or ibuprofen for fever and pain (age-appropriate dosing)
• Plenty of fluids — offer water, juice, and ice chips regularly
• Soft, cool foods — yogurt, ice cream, smoothies, and oatmeal are easiest to swallow
• Rest — let your child rest, but don't force them to stay in bed

Complications — When Is It Serious?

Scarlet fever is generally harmless with proper treatment, but if left untreated it can in rare cases lead to complications.

Acute Complications

These can occur during or right after the illness:

• Ear infection (otitis media)
• Sinus infection (sinusitis)
• Peritonsillar abscess
• Pneumonia

Late Complications (Rare)

Immunological complications can occur 1–5 weeks after the infection:

• Acute post-streptococcal glomerulonephritis — kidney inflammation that can cause fever, abdominal pain, dark urine, and swelling. Usually occurs 1–3 weeks after infection.
• Rheumatic fever — can cause fever, fatigue, joint pain, and in serious cases heart damage. Occurs 1–5 weeks after infection. Extremely rare in developed countries with good healthcare access.

When Should You Contact a Doctor Immediately?

Call your pediatrician or go to urgent care if your child:

• Does not improve after 48 hours on antibiotics
• Develops significant swelling in the throat or difficulty breathing
• Has dark or bloody urine in the weeks following the illness
• Complains of joint pain or chest pain after recovering
• Appears very lethargic or is difficult to wake

Daycare and School — How Long to Stay Home?

One of the most common questions parents ask is how long their child needs to stay home from daycare.

After Starting Antibiotics

According to AAP guidelines, the child is considered non-contagious after 24 hours of antibiotic treatment. The child can return to daycare or school after 24 hours on antibiotics, provided that:

• The child is fever-free
• The child's general condition is good (eating, drinking, and feeling reasonably well)

Without Antibiotics

If the child is not treated with antibiotics (which is rarely appropriate with scarlet fever), they are contagious for 10–20 days.

Tips for Daycare

• Notify the daycare so they can inform other parents
• Other children who develop symptoms should be evaluated by a doctor
• Good hand hygiene and cleaning of toys reduces the spread of infection

Scarlet Fever in Babies and Infants

Parents of babies naturally wonder whether the youngest children can also be affected.

Is Scarlet Fever Common in Babies?

No, scarlet fever is uncommon in children under 3 years old. This is because strep throat is generally rare in this age group. Most sore throats in babies and toddlers are caused by viruses, not bacteria.

Can Babies Get Scarlet Fever?

It is possible, but rare. If a baby under 1 year develops symptoms resembling scarlet fever (fever, rash), you should always contact a doctor to rule out other causes of the rash.

What to Do If You Suspect It

• Contact a doctor promptly — babies with fever should always be evaluated by a doctor
• The doctor will perform a thorough assessment and possibly a rapid strep test
• Treatment is the same as for older children, with dosing adjusted for weight

Prevention

There is no vaccine against scarlet fever, but you can reduce the risk of transmission:

• Good hand hygiene — wash hands regularly, especially after coughing and sneezing
• Avoid sharing water bottles and utensils between children
• Keep sick children home from daycare until they have been on antibiotics for at least 24 hours
• Clean toys and surfaces in the home when someone in the family is sick

Frequently Asked Questions

Can You Get Scarlet Fever More Than Once?

It is rare to get scarlet fever more than once. After going through the illness, the body usually develops immunity to the toxins that cause the rash. It is still possible to get strep throat again, but without the typical rash.

How Long Does Scarlet Fever Last?

With antibiotic treatment, most children feel better within 24–48 hours. The rash fades after 4–5 days. Skin peeling can last 1–3 weeks after the rash is gone, but this is harmless.

Is Scarlet Fever Dangerous?

With proper antibiotic treatment, scarlet fever is not dangerous. Complications are rare. The most important thing is to start treatment quickly and complete the full antibiotic course.

Can Adults Get Scarlet Fever?

Yes, but it is uncommon. Adults who have not had scarlet fever as children can in theory become infected. The symptoms are the same as in children. Adults who have had the illness are usually immune.

Does the Whole Family Need to Be Treated?

No, only the person who is sick needs antibiotics. Other family members do not need preventive treatment unless they develop symptoms. Watch for sore throat and fever in siblings in the weeks that follow.

Want to keep track of your child's health and illness periods? Keep a health log to have all the information in one place and easily accessible. Also check your medicine cabinet to make sure you're prepared the next time your child gets sick.

See Also

• Strep Throat in Children — symptoms, viral vs. bacterial, treatment
• Fever in Children — When to Call the Doctor — fever guide for parents
• Rashes in Children — overview of common types of rashes
• Chickenpox in Children — another common childhood illness with rash

Sources

1. American Academy of Pediatrics (AAP) — Group A Streptococcal Infections
2. Centers for Disease Control and Prevention (CDC) — Scarlet Fever: All You Need to Know
3. WHO — Streptococcal Diseases
4. UpToDate — Scarlet fever in children: Clinical features and management