Tonsillitis: Is It Strep

Published Mar 24, 2025

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Updated Apr 14, 2025

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Est. reading time: 4 minutes

Key points

  • Tonsillitis is an inflammation of the tonsils caused by viral or bacterial infections, while strep throat is specifically caused by Group A Streptococcus bacteria.
  • Both conditions share symptoms like sore throat and swollen lymph nodes, but strep throat often presents more severe symptoms and requires antibiotic treatment.
  • Viral tonsillitis is treated with symptom relief measures, while bacterial tonsillitis and strep throat require antibiotics to eliminate the infection.
  • Urgent medical attention is needed for symptoms like difficulty breathing, inability to open the mouth, worsening fatigue, high fever, severe sore throat, and rash.

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Tonsillitis: Is It Strep


Tonsillitis and strep throat are two common throat-related conditions that can cause discomfort and concern for many individuals, particularly parents of young children. While both conditions share similar symptoms, they have distinct causes and implications for treatment.

  • Tonsillitis is the inflammation of the tonsils, which are two lymph nodes located at the back of the throat. This condition can be caused by viral or bacterial infections and often presents with symptoms such as sore throat, difficulty swallowing and swollen tonsils.

  • Strep throat is a specific bacterial infection of the tonsils caused by Group A Streptococcus (GAS). It is characterized by a severe sore throat, fever and swollen lymph nodes. Contaminated saliva and anything the saliva touches is highly contagious. Unlike most tonsillitis, strep throat requires antibiotic treatment.

Understanding the differences between tonsillitis and strep throat is essential for effective management and recovery. In this article, we will explore the definitions, symptoms and treatment options for both conditions to help clarify their differences and guide those affected toward appropriate care.

8 symptoms of tonsillitis and 8 symptoms of strep throat

Tonsillitis symptoms:

  1. Swollen tonsils
  2. Pain when swallowing
  3. Redness in the throat
  4. Fever
  5. Lymph nodes in the neck that are tender or swollen
  6. Bad breath
  7. Ear pain or discomfort
  8. Difficulty breathing or noisy breathing (in severe cases)

Strep throat symptoms:

  1. Severe sore throat
  2. Streaks of pus on the tonsils
  3. Higher fever than those with tonsillitis
  4. Swollen lymph nodes in the neck
  5. Body aches
  6. Headache
  7. Rash (in some cases, known as scarlet fever)
  8. Nausea, vomiting and abdominal pain (especially in children)

5 causes of tonsillitis

Tonsillitis can result from various viral and bacterial infections, leading to tonsil inflammation and discomfort. Identifying the specific cause can help guide appropriate management strategies and reduce the risk of recurrence. Below are some of the primary causes of tonsillitis according to MedlinePlus:

  1. Viral Infections: Tonsillitis is most commonly caused by viral infections, including the common cold and flu viruses. These infections can lead to inflammation of the tonsils as the body responds to the viral presence. Epstein-Barr virus or mononucleosis often presents as a tonsillitis with pronounced fatigue.
  2. COVID-19: The virus responsible for COVID-19 can also lead to symptoms similar to those of tonsillitis, including sore throat and swollen tonsils. In some cases, tonsillitis may be a manifestation of the broader respiratory symptoms associated with COVID-19.
  3. Influenza: The influenza virus can cause significant throat irritation and inflammation, leading to tonsillitis. Symptoms often include severe sore throat, fever and body aches, similar to other viral causes.
  4. Herpes Virus: The herpes simplex virus can cause a specific type of tonsillitis known as herpetic tonsillitis. This condition is characterized by painful sores and ulcers in the throat and on the tonsils.
  5. Bacterial Infections: While tonsillitis can be caused by other bacteria, it is important to note that the only bacteria known to cause strep throat is Group A Streptococcus (GAS). This bacterium is responsible for the more severe symptoms associated with strep throat, differentiating it from other forms of tonsillitis. The body's response to this bacterium can lead to a number of serious medical conditions especially when left untreated.

Treatment of strep throat and tonsillitis

The treatment approach for tonsillitis and strep throat varies significantly based on the underlying cause of the condition. For tonsillitis, the appropriate treatment will depend on whether the inflammation is caused by a viral or bacterial infection. If the tonsillitis is viral in nature, treatment typically focuses on relieving symptoms, such as pain and fever, with over-the-counter medications, rest and hydration. In some cases, corticosteroids may be prescribed to reduce severe inflammation.

On the other hand, strep throat is specifically caused by the Group A Streptococcus bacteria and requires antibiotic treatment to effectively eliminate the infection and help prevent complications like acute rheumatic fever which can cause heart valve issues later. Healthcare providers prescribe antibiotics, which not only help alleviate symptoms more quickly but also reduce the risk of complications and prevent the spread of the infection to others. It is essential for individuals diagnosed with strep throat to complete the full course of antibiotics as prescribed, even if symptoms improve before finishing the medication. This ensures complete eradication of the bacteria and minimizes the risk of recurrence or complications.

When to see a doctor

Recognizing when to seek medical attention for symptoms of tonsillitis or strep throat is crucial for effective treatment and recovery. While mild cases may resolve on their own, certain signs indicate the need for urgent care. Here are some key signs, according to MedlinePlus, that warrant a visit to a healthcare provider:

  1. Difficulty Breathing: If you experience shortness of breath or wheezing, it may indicate severe inflammation or an obstruction in the airway, requiring immediate medical attention.
  2. Difficulty Opening the Mouth: Inability to open the mouth fully due to pain or swelling can be a sign of severe tonsillitis and may require urgent care.
  3. Worsening Fatigue: Extreme fatigue that worsens over time, especially when accompanied by other symptoms, may indicate a more serious infection that needs evaluation.
  4. High Fever: A persistent fever above 101°F (38.3°C) that does not respond to over-the-counter medications should be assessed by a healthcare professional.
  5. Severe Sore Throat: If the sore throat is extremely painful and makes swallowing or speaking difficult, it is important to seek medical advice.
  6. Rash: The appearance of a rash, particularly with strep throat, could indicate scarlet fever, which requires prompt medical evaluation.

Urgent care near me

If you or a loved one are experiencing symptoms of tonsillitis or strep throat, don’t wait to seek the care you need. Visit Solv today to quickly find urgent care facilities near you.

FAQs

What are the main differences between tonsillitis and strep throat?

Tonsillitis is the inflammation of the tonsils and can be caused by either viral or bacterial infections. Symptoms include sore throat, difficulty swallowing, and swollen tonsils. Strep throat, on the other hand, is a specific bacterial infection caused by Group A Streptococcus (GAS). It is characterized by a severe sore throat, fever, swollen lymph nodes and is highly contagious. Unlike tonsillitis, strep throat typically requires antibiotic treatment for resolution.

What are the symptoms of tonsillitis and strep throat?

Symptoms of tonsillitis include swollen tonsils, pain when swallowing, redness in the throat, fever, tender or swollen lymph nodes in the neck, bad breath, ear pain or discomfort, and difficulty breathing in severe cases. Strep throat symptoms include a severe sore throat, streaks of pus on the tonsils, a higher fever than those with tonsillitis, swollen lymph nodes in the neck, body aches, headache, rash (known as scarlet fever in some cases), and nausea or vomiting, especially in children.

What causes tonsillitis and strep throat?

Tonsillitis can be caused by various viral and bacterial infections, including the common cold, flu viruses, COVID-19, influenza, and the herpes simplex virus. The only bacteria known to cause strep throat is Group A Streptococcus (GAS).

How are tonsillitis and strep throat treated?

The treatment for tonsillitis depends on whether the inflammation is caused by a viral or bacterial infection. If it's viral, treatment typically focuses on relieving symptoms, such as pain and fever, with over-the-counter medications, rest, and hydration. For strep throat, which is caused by the Group A Streptococcus bacteria, antibiotic treatment is required to effectively eliminate the infection.

When should I seek medical attention for symptoms of tonsillitis or strep throat?

You should seek medical attention if you experience difficulty breathing, can't fully open your mouth due to pain or swelling, have worsening fatigue, a persistent fever above 101°F (38.3°C) that does not respond to over-the-counter medications, a severely painful sore throat that makes swallowing or speaking difficult, or a rash. These could be signs of a more serious infection that needs evaluation.

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Dr. Linda Halbrook is a Board-Certified Family Medicine physician with over 40 years of experience, dedicated to providing comprehensive care to patients across Texas. She retired from practice but currently serves on the Clinical Services Committee of CommonGood Medical, a non-profit organization serving the uninsured in Collin County. 

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Solv has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references.

Topics in this article

IllnessPrimary CareRespiratory InfectionsCovid 19
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