Scarlet Fever - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A bacterial infection causing a red rash, sore throat, and fever. It's caused by the same bacteria as strep throat and is treated with antibiotics.
Concerned this might be scarlet fever? Scan it with our AI skin checker for instant analysis, or use our AI mole checker for pigmented lesions. Browse all 80+ skin conditions in our directory.
Quick Answer
Scarlet fever is an infection caused by the same bacteria responsible for strep throat. It primarily affects children and presents with a characteristic red, sandpaper-like rash, a high fever, a severe sore throat, and a swollen, bumpy tongue known as a strawberry tongue. You might also notice flushed cheeks with a pale ring around the mouth. Because it is a bacterial illness, it requires prompt medical evaluation and prescription antibiotics to clear the infection, relieve symptoms, and prevent serious complications.
Symptoms
- Red, sandpaper-like rash
- Sore throat
- High fever
- Strawberry tongue
- Flushed cheeks with pale around mouth
- Rash in skin folds (Pastia's lines)
Causes & Risk Factors
- Group A Streptococcus bacteria
- Spread through respiratory droplets
- Complication of strep throat
Treatment & Management
- Antibiotics (penicillin, amoxicillin)
- Complete the full course
- Rest and fluids
- Pain relievers for sore throat and fever
When to See a Doctor
If your child has a rash with fever and sore throat
Frequently Asked Questions
What does a scarlet fever rash look and feel like?
The rash typically begins as small, flat red blotches that gradually become fine bumps, feeling remarkably like sandpaper when touched. It often starts on the chest or stomach before spreading. You might also see deep red creases in skin folds, particularly around the underarms, elbows, and groin, which are known as Pastia's lines.
How do you catch scarlet fever?
Scarlet fever is highly contagious and spreads through respiratory droplets. When an infected person coughs or sneezes, the Group A Streptococcus bacteria are released into the air. You can catch it by breathing in these droplets or touching a contaminated surface and then touching your nose or mouth. It often develops as a complication of untreated strep throat.
What does it mean when someone mentions a strawberry tongue?
A strawberry tongue is one of the classic signs of scarlet fever. In the early stages of the illness, the tongue may appear to have a white coating with swollen, red bumps emerging through it. After a few days, the white coating usually peels away, leaving the tongue looking bright red and bumpy, closely resembling a fresh strawberry.
How is scarlet fever treated?
Because scarlet fever is a bacterial infection, it is treated with prescription antibiotics, typically penicillin or amoxicillin. It is incredibly important to complete the entire course of medication, even if your child feels completely better after a few days. Getting plenty of rest, drinking adequate fluids, and taking over-the-counter pain relievers can also help soothe the sore throat and fever.
When should I take my child to the doctor for a rash?
You should seek a medical evaluation if your child develops a sudden, widespread rash accompanied by a high fever or a sore throat. Scarlet fever requires professional medical attention to confirm the bacterial infection and obtain the necessary antibiotics. Prompt treatment prevents the illness from worsening and protects against rare but serious long-term complications.
How long does it take to recover from scarlet fever?
With appropriate antibiotic treatment, the fever and sore throat usually improve within a day or two. The sandpaper-like rash often begins to fade after about a week. As the rash disappears, you might notice the skin peeling, particularly on the fingertips, toes, and groin area. This peeling is completely normal and can last for a few weeks.
Can scarlet fever be prevented?
There is currently no vaccine to prevent scarlet fever. The best way to avoid catching or spreading the infection is through excellent hygiene. Encourage frequent and thorough handwashing with soap and water. Teach children to cover their mouths when coughing or sneezing, and avoid sharing drinking glasses, eating utensils, or toothbrushes with anyone who is currently sick.
How can ScanSkinAI help if I suspect scarlet fever?
ScanSkinAI can analyze pictures of a rash and compare them to our database, helping you understand if your symptoms resemble typical characteristics of scarlet fever, like the sandpaper texture or Pastia's lines. However, our AI is strictly an educational screening aid, not a diagnostic tool. A doctor must evaluate the sore throat and prescribe antibiotics for a definitive diagnosis.
Related Conditions
Medical References
Information on this page is sourced from and verified against reputable medical resources:
Concerned About Your Skin?
Upload a photo and get instant AI-powered analysis across 80+ skin conditions. Track your condition over time with photo timelines, or use our dedicated AI mole checker for moles and pigmented lesions.
Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.