Tonsillitis
Inflammation of the tonsils that can cause throat pain, fever, and painful swallowing
Medically reviewed by a board-certified ENT specialist
- Author:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Medical reviewer:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Reviewed on:
- Last updated:
- Estimated reading time: 3 min
Overview
What is tonsillitis?
Tonsillitis is inflammation of the tonsils, the two lymphoid tissues at the back of the throat. It can be caused by viral or bacterial infection. Typical symptoms include sore throat, fever, and painful swallowing. Medical assessment helps identify cases that may need targeted treatment and detect complications such as peritonsillar abscess.
Symptoms
Common symptoms
Severity varies by cause, age group, and overall health status.
Severe sore throat, especially when swallowing
Fever, chills, or fatigue
Red, swollen tonsils with white patches or exudate
Muffled or altered voice
Tender enlarged neck lymph nodes
Bad breath or unpleasant taste
Referred ear pain without primary ear infection
Possible causes
Why tonsils become inflamed
Infection and host factors can both contribute.
Viral infection
The most common trigger, including common cold and influenza-related viruses.
Bacterial infection
Such as Group A streptococcus, often associated with higher fever and marked throat pain.
Close-contact transmission
Sharing utensils and close exposure to infected individuals can spread pathogens.
Temporary immune vulnerability
Poor sleep, stress, or intercurrent illness may increase susceptibility to infection.
Airway irritants
Smoke and pollutants can worsen throat inflammation and discomfort.
Recurrent tonsillar disease
A prior history of recurrent episodes may increase the chance of future recurrences.
When to seek care
When should I see an ENT specialist?
Certain symptoms may indicate severe infection or complications.
Severe throat pain that worsens or does not improve in 3-5 days
Inability to swallow fluids, drooling, or signs of dehydration
Trismus (difficulty opening the mouth) or severe one-sided throat pain
Breathing difficulty, noisy breathing, or neck swelling
Persistent high fever or reduced alertness
Frequent recurrent tonsillitis affecting daily function
Underlying conditions that increase complication risk
Diagnosis
How is it diagnosed?
Diagnosis is based on history and focused examination of the throat and neck lymph nodes. In selected cases, rapid strep testing or throat culture may be used to support treatment decisions and avoid unnecessary antibiotics.
Treatment
Treatment options
Management depends on cause, severity, and recurrence pattern.
Supportive care
Includes pain and fever control, hydration, and rest to ease symptoms.
Antibiotics when clinically indicated
Used for suspected or confirmed bacterial infection under medical guidance.
Monitoring for complications
Possible complications such as peritonsillar abscess may need urgent specialist treatment.
Tonsillectomy in selected patients
May be considered for frequent recurrent episodes or complication-prone disease.
Self-care
What you can do at home
Home measures can reduce discomfort and support recovery.
Rest and maintain good hydration
Choose soft foods and avoid very spicy or acidic meals
Avoid smoking and second-hand smoke
Practice hand hygiene and avoid sharing personal utensils
Take medicines exactly as prescribed
Prevention
Reducing risk
Good infection-control habits may reduce future episodes.
Wash hands regularly, especially before meals
Avoid sharing cups, spoons, or personal items
Use a mask when symptomatic or in crowded settings
Maintain adequate sleep and general health
FAQ
Frequently asked questions
Common concerns about tonsillitis and recurrence.
Is tonsillitis contagious?
When caused by viral or bacterial infection, it can spread through respiratory droplets and close contact.
Does everyone with tonsillitis need surgery?
No. Tonsillectomy is considered only in selected cases, such as frequent recurrence or complications.
Do white patches always mean bacterial infection?
Not always. Viral infections can also cause tonsillar exudate, so clinical assessment is important.
Can I stop antibiotics once I feel better?
Do not stop early without medical advice. Follow the prescribed course to reduce recurrence and resistance risk.
What if swallowing becomes very difficult?
Seek urgent care if you cannot swallow fluids, are drooling, or develop breathing difficulty.
References
Related guidelines and patient resources
The sources below are recognized international guidelines and patient-education resources for general learning. They are not individualized medical advice.
Patient information on throat, voice, and swallowing
AAO-HNS / ENThealth
View source (AAO-HNS / ENThealth)Patient education and clinical guidance in otolaryngology
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
View source (American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS))Public ENT health information
ENThealth (AAO-HNS Foundation)
View source (ENThealth (AAO-HNS Foundation))
Educational information
Medical Disclaimer
This information is intended for educational purposes only and does not replace diagnosis or treatment by a qualified physician. If you have concerning symptoms, please consult an ENT specialist.
Related links
Learn more
Related clinic pages to help you explore conditions, services, and procedures.
Severe sore throat or recurrent tonsillitis?
An ENT consultation can clarify the cause and help tailor safe, evidence-based treatment.