Knowledge Centre
Providing rapid medical guidance and expert health insights for informational purposes. While our guides are written by Harley Street clinicians, they do not replace a professional consultation.
Scarlet Fever: Symptoms and Treatment
Scarlet fever is a bacterial infection caused by group A streptococcus (GAS), the same bacteria responsible for strep throat. It mainly affects children between 2 and 8 years old. The infection produces a toxin that causes its characteristic rough, sandpaper-like rash, along with a sore throat and high temperature.
It's a notifiable disease in England, meaning cases must be reported to public health authorities. Scarlet fever saw a significant resurgence in the UK from 2014 onwards, with seasonal peaks in late winter and spring. With antibiotics, it clears quickly and complications are rare.
Seek urgent medical advice if your child has:
- Difficulty breathing or noisy breathing
- Difficulty swallowing fluids or drooling
- Skin that looks mottled, very pale, or bluish
- A stiff neck or reluctance to move the neck
- High fever that doesn't respond to paracetamol and ibuprofen
- Reduced alertness, unusual drowsiness, or floppiness
Invasive group A strep (iGAS) infection is rare but serious. If your child seems more unwell than expected or is deteriorating, seek immediate medical help.
Symptoms
Scarlet fever typically begins with a sore throat, fever (38°C or above), and headache. Within 12-48 hours, the rash appears. It starts on the chest and stomach, then spreads to the arms, legs, and neck. The rash feels rough — like sandpaper — which distinguishes it from most other childhood rashes.
The face may look flushed, but the skin around the mouth stays notably pale. This circumoral pallor is one of the classic signs. The tongue often develops a white coating initially, which peels to reveal a red, bumpy surface — the so-called "strawberry tongue."
Other symptoms include swollen neck glands, body aches, nausea, and general malaise. The rash fades after about a week, often followed by peeling skin on the fingers, toes, and groin — similar to peeling after sunburn.
Treatment
Antibiotics are the standard treatment. Phenoxymethylpenicillin (penicillin V) taken for 10 days is first-line. For children allergic to penicillin, azithromycin or clarithromycin are alternatives. Antibiotics shorten the illness, reduce complications, and — importantly — make the child non-contagious after 24 hours.
Completing the full 10-day course is important, even though the child will feel better much sooner. Stopping early increases the risk of the infection returning or complications developing.
For symptom relief, paracetamol or ibuprofen helps with fever and throat pain. Cool drinks, soft foods, and avoiding irritants to the throat make eating more comfortable. Calamine lotion or antihistamines can ease itching from the rash.
Spreading and school exclusion
Group A strep spreads through respiratory droplets — coughs, sneezes, and close contact. Sharing cups, towels, or bedding with an infected child can also transmit it. The incubation period is 2-5 days.
NHS guidance is that children should stay away from nursery or school for at least 24 hours after starting antibiotics. Without antibiotics, they can remain infectious for 2-3 weeks. Good hand hygiene, using tissues for coughs and sneezes, and not sharing utensils reduce household transmission.
Complications
With prompt antibiotic treatment, complications are uncommon. Possible early complications include ear infection, sinusitis, and peritonsillar abscess (quinsy). Late complications, which are rare, include acute rheumatic fever (which can affect the heart valves) and post-streptococcal glomerulonephritis (kidney inflammation).
These complications are the main reason antibiotics are prescribed — not just to speed recovery, but to prevent these downstream risks.
How we can help
We offer same-day paediatric GP appointments for children with suspected scarlet fever. The consultation includes throat examination, assessment of the rash, and a rapid strep test if needed to confirm the diagnosis. Antibiotic prescriptions are issued on-site.
If your child has recurrent strep throat or you're concerned about exposure at school, our GPs can advise on prevention, household management, and when further investigation is warranted.
Same-day paediatric consultation
Throat examination, rash assessment, rapid strep test, and antibiotic prescription. No referral required.
Call 020 7499 1991 or book online.
Dr Mohammad Bakhtiar
Health Screening and Men's Health • GMC 4694470
"Leading our clinical team, Dr Bakhtiar has been seeing patients at Medical Express Clinic for over 20 years. Patients regularly praise his expertise in comprehensive health assessments, sexual health screening, diagnosis and treatment as well as his personable and compassionate approach to care."
View TeamCommon Questions
Q.How can I tell if it's scarlet fever or just a rash?
The scarlet fever rash has a distinct sandpaper-like texture — rough to the touch rather than smooth. It usually starts on the chest and stomach before spreading to the rest of the body. The face is flushed but the area around the mouth stays pale (circumoral pallor). A 'strawberry tongue' — white coating followed by red, swollen taste buds — is another characteristic feature. The combination of sore throat, fever, and this specific rash strongly suggests scarlet fever.
Q.Is scarlet fever dangerous?
With antibiotics, scarlet fever is a straightforward illness that resolves within a week. Complications are uncommon when treated promptly. Untreated, there's a small risk of peritonsillar abscess, ear infection, sinusitis, and rarely, post-streptococcal conditions like rheumatic fever or kidney inflammation (glomerulonephritis). These complications are the reason antibiotics are recommended even though the illness would eventually clear on its own.
Q.Can adults get scarlet fever?
Yes, though it's much less common. Scarlet fever predominantly affects children aged 2-8 years. Adults can develop strep throat from the same bacteria but are less likely to develop the characteristic rash. Adults in close contact with an affected child who develop a sore throat and fever should see a doctor, as they may need antibiotic treatment.
Q.How long is my child contagious?
Without antibiotics, a child with scarlet fever can spread the infection for 2-3 weeks. Once antibiotics are started, they are no longer contagious after 24 hours. This is why most schools and nurseries allow children to return after 24 hours on antibiotics, provided they feel well enough. The bacteria spread through respiratory droplets (coughs, sneezes) and direct contact.
Q.Does the skin peel after scarlet fever?
Yes. As the rash fades (usually after about a week), the skin often peels, particularly on the fingertips, toes, and groin area. This is normal and can last 1-2 weeks. It doesn't require any special treatment — moisturiser can help if the skin feels dry. Peeling doesn't mean the child is still contagious.
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