A sore throat and swollen tonsils can be concerning, especially when you’re not sure what’s causing them. In many cases, the cause may be tonsillitis. In others, it may be a peritonsillar abscess, a more serious condition that requires prompt medical attention. These two conditions can share early symptoms, making them difficult to tell apart without an examination.
The main difference is where the problem develops. Tonsillitis involves inflammation or infection of the tonsils themselves. A peritonsillar abscess is a pocket of pus that forms in the tissue next to a tonsil, known as the peritonsillar space, often as a complication of an infection that has already started. Both can cause throat pain, fever, and swollen tonsils, but an abscess more often causes severe pain on one side along with other warning signs.
Below, we’ll look at how tonsillitis and a peritonsillar abscess differ, what an abscess can feel like, and how each condition is typically diagnosed and treated. For patients in West Hills and Encino, C/V ENT Surgical Group provides ENT evaluation and treatment for tonsil infections and related throat concerns.
What Are Tonsillitis and a Peritonsillar Abscess?What Are Tonsillitis and a Peritonsillar Abscess?
Tonsillitis is inflammation or infection of the tonsils, two pads of lymphoid tissue at the back of the throat that are part of the immune system. Viral or bacterial infections can cause tonsillitis, including infections involving group A strep.
Common symptoms include a sore throat, fever, redness, swollen tonsils, and painful swallowing. The tonsils may also have white or yellow patches on their surface. Many cases remain limited to the tonsils and improve with appropriate care.
A peritonsillar abscess develops when pus collects in the tissue next to a tonsil rather than within the tonsil itself. The resulting swelling can press against nearby tissue, including the soft palate and muscles involved in swallowing. It often develops when an infection spreads beyond the tonsil into the surrounding area.
Also Read: How Sinusitis Can Cause Tonsillitis and other Problems
Why Location Matters
Tonsillitis can affect one or both tonsils and often causes a more generalized sore throat. A peritonsillar abscess typically develops beside one tonsil, which is why severe one-sided pain and swelling can be important warning signs.
This difference in location also affects how each condition is evaluated and treated, making an accurate diagnosis important.
Tonsillitis vs. Peritonsillar Abscess: How Can You Tell the Difference?
Although the symptoms can overlap, certain patterns may help distinguish tonsillitis from a peritonsillar abscess.
Tonsillitis commonly causes:
- A general sore throat
- Red or swollen tonsils
- Fever
- Swollen neck glands
- Pain with swallowing
- White or yellow patches on the tonsils in some cases
A peritonsillar abscess more often causes:
- Severe pain that is noticeably worse on one side
- Difficulty opening the mouth fully
- A muffled or altered voice
- Drooling
- Significant difficulty swallowing
- Swelling that may push the uvula to one side
Symptoms alone cannot always distinguish the two conditions. Early in its development, a peritonsillar abscess may simply feel like a severe sore throat that is worse on one side, making it easy to underestimate.
A physical examination is often necessary. An ENT provider can examine the tonsils, throat, and surrounding tissue to determine whether the infection appears limited to the tonsil or has spread into the surrounding area.
Can Tonsillitis Turn Into a Peritonsillar Abscess?Can Tonsillitis Turn Into a Peritonsillar Abscess?
Yes, in some cases. Tonsillitis can spread beyond the tonsil into nearby tissue, allowing pus to collect in the space next to it. This does not happen with every case of tonsillitis, and many people recover with standard care without developing an abscess.
Certain changes can suggest that the infection is becoming more serious rather than following the expected course. Seek medical evaluation if you notice:
Symptoms that worsen after several days instead of improving
- Pain that becomes clearly worse on one side
- New or increasing difficulty swallowing
- Fever that persists or returns after seeming to improve
What Does a Peritonsillar Abscess Feel Like?
A peritonsillar abscess often causes pain that feels sharper and more focused than a typical sore throat. The pain is usually worse on one side and may increase when swallowing, talking, or opening the mouth.
Some people also develop ear pain on the same side, even though the ear itself is not infected. This can happen because the throat and ear share nerve pathways.
Other warning signs can include:
- A muffled, sometimes described as “hot potato,” voice
- Drooling because swallowing is painful or difficult
- Trouble opening the mouth fully
- Visible swelling or unevenness at the back of the throat
When several of these symptoms occur together, the infection may require urgent medical attention rather than home treatment. A symptom list cannot confirm an abscess, however, so a hands-on examination is important.
Also Read: Major Differences Between Tonsillitis and Sinus Infections
How Is a Peritonsillar Abscess Diagnosed and Treated?
Getting a Diagnosis
An ENT clinician examines the throat, tonsils, palate, and uvula. The evaluation may also include checking voice quality, swallowing, and how well the patient can open the mouth.
In many cases, the examination provides enough information to distinguish tonsillitis from a peritonsillar abscess. Additional testing or imaging, such as a CT scan or intraoral ultrasound, may sometimes be used to confirm the diagnosis or help plan treatment.
Treatment Options
Treatment depends on the diagnosis and severity of the infection.
Rest, fluids, and supportive care: Uncomplicated tonsillitis, particularly when caused by a virus, may be managed with hydration, rest, and treatment for pain or fever while the infection resolves.
Antibiotics: When tonsillitis is bacterial or a peritonsillar abscess is present, clinicians may prescribe antibiotics to treat the infection and help prevent further spread.
Needle aspiration: For some abscesses, a clinician may use a needle to remove pus from the affected area. This can relieve pressure and pain depending on the size and location of the abscess.
Incision and drainage: In some cases, a small incision may be made to allow the pus to drain. Whether this approach or needle aspiration is used depends on the individual case.
Tonsillectomy: Tonsil removal may be discussed for selected patients with repeated infections or abscesses as a longer-term treatment consideration separate from managing the immediate infection.
A peritonsillar abscess should not be drained at home. The appropriate treatment depends on factors such as the severity of the infection, the ability to swallow and breathe, and the patient’s overall health.
When Does a Severe Throat Infection Need Urgent Medical Attention?
Some symptoms should be evaluated promptly rather than waiting to see whether a throat infection improves.
Seek urgent medical attention for symptoms such as:
- Trouble breathing
- Inability to swallow liquids
- Drooling because swallowing is difficult
- Rapidly increasing throat or neck swelling
- Severe or worsening pain on one side
- Significant difficulty opening the mouth
Breathing difficulty, rapidly worsening swelling, or an inability to swallow may require emergency evaluation. Other severe or worsening symptoms should also be assessed promptly so a clinician can determine whether the infection remains limited to the tonsil or has spread into surrounding tissue.
C/V ENT Surgical Group provides evaluation and treatment for tonsil and throat conditions at our West Hills location and Encino location.
Also Read: Tonsillectomy in the 30s: What to Expect and How Recovery Differs from Childhood
Get the Right Evaluation for a Severe or Worsening Throat Infection
Tonsillitis and a peritonsillar abscess can share early symptoms, but severe one-sided pain, increasing swelling, difficulty swallowing, a muffled voice, or trouble opening the mouth can signal that the infection needs closer evaluation. A medical examination can determine whether the problem remains limited to the tonsil or has spread into the surrounding tissue.
If you or a family member has a severe or worsening throat infection, contact C/V ENT Surgical Group at our West Hills office or Encino office for an ENT evaluation. If breathing becomes difficult or swelling or swallowing problems become severe, seek emergency medical attention.
Frequently Asked Questions
How Can You Tell Tonsillitis From a Peritonsillar Abscess?
Tonsillitis commonly causes a general sore throat, swollen or red tonsils, fever, and painful swallowing. A peritonsillar abscess is more likely to cause severe one-sided pain along with symptoms such as a muffled voice, drooling, significant difficulty swallowing, or trouble opening the mouth. Because the symptoms can overlap, an examination may be necessary to tell the difference.
Can Tonsillitis Turn Into a Peritonsillar Abscess?
Yes. A peritonsillar abscess can develop when an infection spreads beyond the tonsil and pus collects in the surrounding tissue. However, this does not happen with every case of tonsillitis, and many people recover without developing an abscess.
What Does a Peritonsillar Abscess Feel Like?
A peritonsillar abscess often causes severe throat pain that is noticeably worse on one side. Pain may increase when swallowing, speaking, or opening the mouth. A muffled voice, drooling, ear pain on the affected side, or difficulty opening the mouth can also occur.
Does a Peritonsillar Abscess Always Need to Be Drained?
Treatment depends on the individual case and severity of the infection. Needle aspiration and incision and drainage are treatment options for some abscesses, while the specific approach is determined after clinical evaluation based on the infection and the patient’s condition.
How Long Does It Take to Recover From a Peritonsillar Abscess?
Recovery time varies depending on the severity of the infection, the treatment used, and how the individual responds to care. Your ENT provider can give you a more personalized recovery estimate based on your condition and progress after treatment.
When Is a Tonsil Infection an Emergency?
Trouble breathing, inability to swallow liquids, rapidly increasing swelling, drooling because swallowing is difficult, or other severe or rapidly worsening symptoms require prompt medical attention. Breathing difficulty or severe swallowing problems may require emergency evaluation rather than waiting for a routine ENT appointment.