Strep throat requires antibiotics to clear the infection. Unlike a regular sore throat caused by a virus, strep is a bacterial infection that won’t resolve reliably on its own, and leaving it untreated can lead to serious complications. The good news: most people start feeling better within a day or two of starting treatment, and the full course of antibiotics typically lasts 10 days.
How Strep Throat Is Diagnosed
Before you can treat strep, you need to confirm it’s actually strep and not a viral sore throat. A doctor or clinic will swab the back of your throat and run a rapid strep test, which returns results in minutes. This test is highly accurate when it comes back positive, with a specificity around 96%. If the rapid test is negative but strep is still suspected, a throat culture may be sent to a lab for confirmation, which takes a day or two.
Strep throat has some telltale signs that set it apart from a cold: sudden severe throat pain, pain when swallowing, fever, red and swollen tonsils (sometimes with white patches), and swollen lymph nodes in the front of the neck. Notably, coughing, runny nose, and hoarseness usually point toward a virus rather than strep.
Antibiotic Treatment
Penicillin and amoxicillin are the standard first-choice antibiotics for strep throat. They’re effective, inexpensive, and group A strep bacteria haven’t developed resistance to them. A typical course runs 10 days, and it’s important to finish every dose even after you feel better. Stopping early can leave bacteria alive, increasing the chance of a relapse or complications.
If you’re allergic to penicillin, your doctor has several alternatives. Cephalosporin-type antibiotics are one option for people with mild penicillin allergies, though they’re avoided if you’ve ever had a severe allergic reaction to penicillin. Other options include clindamycin, azithromycin, and clarithromycin. Azithromycin has a shorter course of five days, while the others typically run the full 10.
Most people notice significant improvement within 24 to 48 hours of starting antibiotics. If you’re not feeling any better after two or three days, contact your doctor, as you may need a different antibiotic or the diagnosis may need another look.
When You Can Go Back to Normal
Strep is contagious through respiratory droplets, so staying home matters in the first stretch of treatment. Once you’ve been on antibiotics for at least 24 hours and your fever is gone, you’re generally safe to return to work, school, or daycare without worrying about spreading it to others. Before that 24-hour mark, avoid sharing cups, utensils, or close face-to-face contact.
Managing Pain While You Recover
Antibiotics kill the bacteria, but they don’t do much for the throat pain itself. Over-the-counter pain relievers like ibuprofen (Advil, Motrin) or acetaminophen (Tylenol) help reduce both pain and fever. Avoid giving aspirin to children or teenagers, as it’s been linked to Reye’s syndrome, a rare but serious condition.
For the throat itself, a few simple strategies can make a real difference:
- Salt water gargle: Mix 1/4 teaspoon of table salt in 8 ounces of warm water and gargle several times a day. This works well for older children and adults.
- Cold foods: Sherbet, frozen yogurt, and frozen fruit pops soothe inflamed tissue.
- Honey: A spoonful can coat and calm an irritated throat (not safe for children under one year).
- Warm liquids: Broth, tea, and warm water with honey keep you hydrated and ease discomfort.
Avoid spicy foods, acidic drinks like orange juice, and cigarette smoke or strong chemical fumes, all of which can irritate your throat further. Staying well-hydrated helps your body recover and keeps the throat from drying out.
Why You Shouldn’t Skip Treatment
The biggest reason strep needs antibiotics is the risk of complications. Rheumatic fever can develop one to five weeks after an untreated or improperly treated strep infection. This inflammatory condition can damage the heart valves, sometimes severely enough to require surgery. It’s most common in school-age children between 5 and 15, though it can affect adults too. Someone who has had rheumatic fever once is at higher risk of getting it again with future strep infections.
Other potential complications of untreated strep include peritonsillar abscess (a painful pocket of pus near the tonsils), kidney inflammation, and scarlet fever. These are all preventable with a straightforward course of antibiotics. Even if your symptoms feel mild, getting tested and treated protects you from problems that can show up weeks later.
Recurring Strep Infections
Some people, especially children, get strep throat multiple times a year. If this happens, your doctor may run a throat culture between episodes to check whether you’re a strep carrier, meaning you harbor the bacteria without symptoms but test positive repeatedly. Carriers are at lower risk for complications and are less likely to spread the infection.
For truly recurrent strep infections (generally seven or more episodes in one year, or five per year over two years), a tonsillectomy may be discussed as an option. This is typically reserved for cases where infections are frequent, well-documented, and significantly affecting quality of life. Most people with occasional strep infections won’t need surgery, as each episode responds well to antibiotics on its own.