Strep throat requires antibiotics to clear fully. Unlike a regular sore throat caused by a virus, the group A streptococcal bacteria behind strep won’t reliably go away on its own, and leaving it untreated raises the risk of serious complications. The good news: most people feel significantly better within two to three days of starting medication, and you stop being contagious within the first 24 to 48 hours of treatment.
Getting Tested First
Strep throat symptoms overlap heavily with viral sore throats, so a test is necessary before treatment. Most clinics use a rapid strep test that delivers results in minutes. This test correctly identifies about 86 out of every 100 true strep cases, which means roughly 14 out of 100 are missed. Because of that gap, your doctor may order a follow-up throat culture if the rapid test comes back negative but strep is still suspected. Throat cultures take one to two days but are more accurate.
Common signs that point toward strep rather than a virus include sudden, severe throat pain, fever, swollen lymph nodes in the neck, white patches on the tonsils, and the absence of a cough or runny nose. A cough and congestion actually make strep less likely.
How Antibiotics Clear the Infection
Penicillin or amoxicillin is the standard first-line treatment. Your doctor will typically prescribe a 10-day course. It’s important to finish all 10 days even though you’ll feel better much sooner. Stopping early allows surviving bacteria to rebound and increases the chance of complications or a recurring infection.
For people allergic to penicillin, alternatives exist. Your doctor can choose from several other antibiotic classes that work well against group A strep. Let them know about any drug allergies before you leave the appointment.
In some cases, particularly for people who may have trouble finishing a full pill course, a single injection of penicillin handles the entire treatment in one visit.
Managing Pain While You Recover
Antibiotics kill the bacteria, but they don’t immediately relieve the sore throat. Over-the-counter pain relievers like acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) are effective for easing throat pain and reducing fever. Research suggests both work well, with no strong evidence that ibuprofen outperforms acetaminophen for sore throat specifically.
A few other things can help you feel more comfortable during the first couple of days:
- Warm liquids and cold foods. Broth, tea, and popsicles can soothe an inflamed throat. Stay well hydrated, especially if you have a fever.
- Salt water gargles. Gargling with warm salt water (about half a teaspoon of salt in a cup of water) may temporarily soothe throat pain for some people, though it won’t shorten the illness. Spit the water out rather than swallowing it.
- Throat lozenges or sprays. These provide short-term numbing relief and are fine to use alongside your antibiotic.
- Rest. Your body is fighting an active bacterial infection. Sleep and downtime help.
When You Can Return to Normal Activities
You’re no longer contagious after 24 to 48 hours on antibiotics, which is the standard guideline for returning to work or school. Most people notice their fever breaking and throat pain improving within two to three days. Full symptom resolution typically takes about a week, though finishing the entire antibiotic course takes 10 days.
During that first contagious window, avoid sharing cups, utensils, or towels. Replace your toothbrush once you’ve been on antibiotics for a day or two to avoid reintroducing bacteria to your mouth.
Why Finishing Treatment Matters
Untreated or incompletely treated strep can lead to complications that go well beyond the throat. Rheumatic fever, which can damage the heart valves, is the most well-known risk. It’s rare in developed countries precisely because antibiotic treatment is so widely available, but it still occurs when strep goes untreated.
Another potential complication is post-streptococcal glomerulonephritis, a kidney condition that can develop about 10 days after the initial throat infection. It’s caused by the immune system’s response to the bacteria rather than by the bacteria itself. More than 90% of children who develop it recover fully, but adults face a higher risk of lasting kidney issues. Completing your antibiotics dramatically reduces the chance of these outcomes.
Peritonsillar abscess is a more immediate complication, where a pocket of pus forms near the tonsils. This causes severe one-sided throat pain, difficulty swallowing, and sometimes difficulty opening the mouth. It requires additional treatment beyond standard antibiotics.
When Strep Keeps Coming Back
Some people deal with strep throat repeatedly, which can be frustrating and disruptive. If this happens, your doctor may test family members or close contacts who could be carriers, spreading the bacteria without having symptoms themselves.
Tonsillectomy becomes an option when infections hit a specific threshold: at least seven episodes in one year, at least five per year for two consecutive years, or at least three per year for three consecutive years. These criteria, known as the Paradise criteria, help doctors determine when the burden of repeated infections justifies surgery. Outside of these thresholds, tonsil removal generally isn’t recommended for strep alone.
Recurrent strep can also sometimes reflect incomplete eradication from a previous course. In those cases, your doctor may try a different antibiotic or a longer treatment approach to fully clear the bacteria.