Scarlet fever in children and adults is an infectious disease that occurs most frequently in childhood but can also affect adults, especially when the immune system is weakened. This condition is characterized by fever, sore throat and a specific skin rash. Proper diagnosis and correct treatment are essential to prevent complications.
What is scarlet fever?
Scarlet fever is an acute infectious disease caused by the bacterium Streptococcus pyogenes (group A streptococcus), the same bacterium that commonly causes tonsillitis or streptococcal pharyngitis.
The disease is characterized by:
▪️high fever,
▪️sore throat,
▪️red skin rash with a rough texture,
▪️strawberry tongue and intense redness of the face and throat.
Scarlet fever is a contagious disease that spreads easily from one person to another, especially in group settings such as kindergartens, schools or within families.
How is it transmitted?
Scarlet fever is transmitted through direct contact with an infected person or through exposure to contaminated respiratory secretions. The main routes of transmission are:
▪️through coughing and sneezing,
▪️through direct contact with saliva or nasal secretions,
▪️by sharing personal items (cups, cutlery, towels),
▪️by touching contaminated surfaces and then touching the mouth or nose,
▪️through close contact in crowded places (schools, kindergartens, public transportation).
How long does the risk of transmission last?
The risk of transmission is highest during the first 2–5 days after symptoms appear and decreases significantly after 24 hours of correct antibiotic treatment.
Without treatment, the infected person may remain contagious for about 2–3 weeks. Therefore, isolating the child or adult who has been diagnosed is important to prevent the spread of the infection.
Even if symptoms improve quickly, treatment must be completed to fully reduce the risk of transmission and to prevent complications.
What causes scarlet fever in children?
Scarlet fever in children occurs after infection with group A streptococcus, which produces a toxin responsible for the characteristic skin rash. Children are more vulnerable because their immune system is still developing.
The main causes include:
▪️direct contact with an infected child or adult,
▪️attendance in group environments (nursery, kindergarten, school),
▪️poor hand hygiene,
▪️sharing toys or personal items,
▪️weakened immunity after a viral illness or another recent infection,
▪️exposure to asymptomatic carriers of the bacteria.
When can scarlet fever occur in adults?
Scarlet fever can occur in adults when they come into direct contact with an infected person and do not have acquired immunity against the bacterium.
Although it is less common in adults, the disease may occur especially:
▪️in parents of infected children,
▪️in teachers,
▪️in healthcare workers,
▪️in people with weakened immune systems,
▪️during periods with increased circulation of respiratory infections (autumn and winter).
In adults, symptoms may be milder or, in some cases, more severe, and diagnosis may be delayed because the disease can be mistaken for a common cold or ordinary tonsillitis.
What are the symptoms of scarlet fever?
Scarlet fever manifests through a set of general and local symptoms that usually appear suddenly, a few days after infection with group A streptococcus. The intensity of symptoms may vary depending on the patient’s age and the condition of the immune system.
The most common symptoms are:
▪️high fever (over 38.5°C),
▪️sore throat and difficulty swallowing,
▪️red skin rash with a rough, sandpaper-like texture,
▪️strawberry tongue (red and shiny),
▪️intense redness of the face with pale area around the mouth,
▪️chills and general malaise,
▪️headaches,
▪️nausea or vomiting (especially in children),
▪️enlarged and painful lymph nodes.
How does the disease progress?
The progression of scarlet fever usually follows several clear stages:
-
Onset of the disease
Fever, sore throat, chills and general fatigue appear suddenly. At this stage, the patient is highly contagious. -
Appearance of the skin rash
Within 24–48 hours after onset, a red rash appears on the chest and neck and then spreads to the trunk and limbs. The tongue develops the characteristic “strawberry” appearance. -
Recovery and peeling phase
After 5–7 days, the rash begins to fade and the skin starts to peel, especially on the palms of the hands and soles of the feet.
What are the most common complications?
If not properly treated, scarlet fever can lead to complications, some of which may be serious. The risk is higher in young children and in people with weakened immune systems.
The most common complications include:
▪️otitis media,
▪️sinusitis,
▪️peritonsillar abscess,
▪️acute rheumatic fever,
▪️heart involvement (rheumatic carditis),
▪️glomerulonephritis (kidney damage),
▪️skin infections,
▪️sepsis (in rare cases).
Diagnosis
The diagnosis of scarlet fever is based on clinical examination and laboratory tests. The doctor looks for characteristic signs such as skin rash, sore throat, strawberry tongue and fever.
To confirm the diagnosis, the following tests may be performed:
▪️rapid streptococcal test,
▪️throat swab,
▪️blood tests to detect bacterial infection.
It is important for the diagnosis to be made as early as possible so that treatment can begin and complications can be prevented.
What treatment options are available?
Treatment of scarlet fever includes both standard medical therapies and supportive therapies that help strengthen the immune system and restore the body.
Conventional treatment
▪️Antibiotics – eliminate the bacteria and reduce the risk of complications. They are essential and must be taken exactly as prescribed by the doctor.
▪️Antipyretics and pain relievers – to reduce fever and relieve pain.
▪️Bed rest and hydration – help the body fight the infection and recover faster.
Complementary therapies for body recovery
▪️Vitamin and mineral therapy – supports the immune system and speeds up recovery.
Internal link: Vitamin and mineral therapy
▪️Herbal medicine (phytotherapy) – some plants have anti-inflammatory and immune-boosting effects.
Internal link: Herbal medicine
▪️Probiotics – help restore gut flora after antibiotic treatment and support immunity.
Internal link: Probiotics
▪️Ozone therapy or detoxification therapies – may help eliminate toxins and revitalize the body.
Internal link: Ozone therapy
▪️Therapeutic nutrition – a balanced diet rich in fruits, vegetables and proteins helps the body regenerate.
Internal link: Therapeutic nutrition
These therapies do not replace medical treatment but complement it by supporting the immune system and reducing recovery time.
How can scarlet fever be prevented?
Preventing scarlet fever involves following several simple but effective steps:
-
Wash hands frequently with soap and water.
-
Avoid direct contact with infected individuals.
-
Disinfect toys and commonly used objects.
-
Use separate personal items (cups, cutlery, towels).
-
Air rooms regularly.
-
Isolate the infected person until treatment is completed.
-
Strengthen the immune system through healthy diet and sufficient rest.
Conclusion
Scarlet fever is a contagious disease that can affect both children and adults, but it can be effectively treated when diagnosed early. Following the prescribed treatment and adopting supportive immune-strengthening measures are essential for full recovery and for preventing complications.
If you notice symptoms of scarlet fever in yourself or your child, consult a doctor as soon as possible for an accurate diagnosis and a personalized treatment plan.
For more information about supportive therapies and prevention methods, we invite you to explore our health and immunity resources.
Bibliography:
https://www.mayoclinic.org/diseases-conditions/scarlet-fever/symptoms-causes/syc-20377406 - Accessed on 02/04/2026
https://www.nhs.uk/conditions/scarlet-fever/
https://my.clevelandclinic.org/health/diseases/23108-scarlet-fever
Dick, G. F., & Dick, G. H. (1924). Scarlet fever.American Journal of Public Health, 14(12), 1022-1028.
Sabir, S., & Perera, T. (2025). Scarlet Fever.StatPearls
Frequently asked questions
What is the incubation period?
The incubation period of scarlet fever is generally between 2 and 5 days from the moment of infection with group A streptococcus. During this time, the person does not show obvious symptoms, but the bacteria multiplies in the body. After this period, fever, sore throat and the characteristic skin rash appear suddenly.
In which area does scarlet fever rash appear first?
The rash of scarlet fever usually appears first on the neck and upper chest (thorax). It then quickly spreads to the abdomen, back and limbs. Flexural areas such as the armpits, elbows and groin may show more intense redness. Typically, the area around the mouth remains pale, contrasting with the redness of the face.
Do scarlet fever spots cause itching?
In most cases, scarlet fever spots do not cause intense itching, but they may create mild discomfort or a feeling of dry, rough skin. In some patients, especially children, mild itching can occur, particularly during the healing phase when the skin begins to peel.
How does the affected skin look after the disease disappears?
After the rash fades, the skin enters a peeling (desquamation) phase, which most often appears on the palms of the hands and soles of the feet, but also on the trunk. The skin may peel in fine flakes or small patches, and this process can last from several days up to two weeks. After regeneration, the skin returns to its normal appearance without leaving scars.
