Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Strep throat is a bacterial throat infection caused by group A Streptococcus. Unlike a viral sore throat, it usually comes on suddenly with a severe sore throat and fever but no cough, and it needs antibiotics to prevent complications.
A full course of antibiotics prescribed by a doctor (do not stop early)
Rest, plenty of fluids and warm salt-water gargles
Paracetamol or ibuprofen for pain and fever
Soft, soothing foods and cool drinks
Staying home for about 24 hours after starting antibiotics to avoid spreading it
Replacing your toothbrush once recovered
When to see a doctor urgently
Difficulty breathing or swallowing, or drooling
A high fever that does not improve within 48 hours of starting antibiotics
A red, sandpaper-like rash (possible scarlet fever)
Joint pain, dark urine or chest symptoms weeks later (rare complications)
A child who is very unwell, not drinking, or dehydrated
Not a diagnosis. MedDroid gives general educational information about strep throat. It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
How is strep throat different from a normal sore throat?
Most sore throats are viral and come with a cough or runny nose. Strep throat usually starts suddenly with a severe sore throat, fever and swollen glands but no cough. A throat swab is the only sure way to tell them apart.
Do I always need antibiotics for strep throat?
If a swab confirms strep, antibiotics are recommended — not only to feel better sooner, but to prevent complications such as rheumatic fever and kidney inflammation. Viral sore throats do not need antibiotics.
Is strep throat contagious?
Yes, it spreads easily through coughs, sneezes and shared items. People are usually no longer contagious about 24 hours after starting antibiotics.
What happens if strep throat is left untreated?
Untreated strep can occasionally lead to serious problems such as rheumatic fever (which can affect the heart) or kidney inflammation, so it should be checked by a doctor.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.