Your baby is fussy, feverish and refusing feeds, and you have heard that strep throat is going around. Strep is much less common in babies than in school-age children, and it often looks different. Understanding strep throat in babies helps you know what to watch for and why a doctor’s check matters.
Quick answer: strep throat in babies
- Caused by group A Streptococcus bacteria.
- Uncommon under 3 years; most sore throats in babies are caused by viruses.
- Symptoms in babies are often vague: fever, irritability, runny nose, poor feeding and swollen glands.
- Diagnosis needs a throat swab; confirmed strep is treated with antibiotics.
Symptoms in babies and toddlers
- fever and irritability
- refusing feeds or crying when swallowing
- thick runny nose that lasts
- swollen, tender glands in the neck
- sometimes a fine, rough, red rash (scarlet fever)
Strep or a viral sore throat?
Viral sore throats usually come with a cough, runny nose and cold symptoms. Strep is more likely when there is fever without a cough, very red tonsils with white patches and tender neck glands, especially if an older sibling has strep. Only a test can tell for sure. See allergy vs cold vs flu in babies.
Diagnosis and treatment
- a rapid strep test or throat culture from a quick swab
- antibiotics, usually penicillin or amoxicillin, for confirmed strep
- finish the full course, even if your child feels better sooner
- children are usually no longer contagious after 12 to 24 hours of antibiotics
Comfort at home
- Offer frequent feeds; cool drinks and soft foods help older babies.
- Use paracetamol (acetaminophen), or ibuprofen from 6 months, for pain and fever at the right dose. See acetaminophen vs ibuprofen.
- Let your baby rest.
- Wash hands often and do not share cups or spoons.
When to talk to your doctor
- fever in a baby under 3 months
- difficulty breathing, drooling a lot or unable to swallow: seek urgent help
- refusing to drink or fewer wet nappies
- a red, rough rash with fever
- swollen glands, ear pain or symptoms that do not improve after 48 hours of antibiotics
Frequently asked questions
Is strep contagious?
Yes, through coughs, sneezes and shared items. Keep your child home until they have had antibiotics for at least 12 to 24 hours and feel better.
Can strep cause complications?
Untreated strep can rarely lead to rheumatic fever or kidney problems, which is why testing and treatment matter.
Should siblings be tested?
Only if they develop symptoms. Ask your doctor.
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Sources
- CDC: Strep throat
- American Academy of Pediatrics, HealthyChildren.org: Strep Throat
- NHS: Tonsillitis; Scarlet fever
This guide is general information, not medical advice. If your baby is unwell, contact your doctor.