The palatine tonsils—commonly referred to simply as tonsils—are two oval-shaped pads of lymphoid tissue located at the back of the throat. Along with the adenoids (located high behind the nose), they form part of Waldeyer’s ring, an immunological defense ring positioned at the entrance of the respiratory and digestive tracts.
People often pay little attention to their tonsils until they become swollen, painful, or coated in white spots. A very common question asked in the ENT clinic is: What is the actual purpose of tonsils, and what happens if they are removed?
1. The Immune Function of Tonsils and Adenoids
Tonsils and adenoids act as guardians for your immune system, especially during early childhood:
- Pathogen Sampling: They sample incoming viruses and bacteria inhaled through the mouth and nose.
- Antibody Production: Special cells inside the lymphoid tissue produce antibodies (such as secretory IgA) to neutralize infections before they travel deeper into the lungs or bloodstream.
- Immune Memory: They help train the young immune system to recognize common environmental microbes.
2. Why Do Tonsils Become Inflamed (Tonsillitis)?
Because tonsils are on the front lines of infection control, they frequently come into contact with pathogens. When viruses (such as Epstein-Barr or adenovirus) or bacteria (such as Streptococcus pyogenes) overwhelm the tissue, the tonsils become inflamed—a condition known as tonsillitis.
Common Symptoms of Acute Tonsillitis:
- Severe sore throat and painful swallowing (odynophagia).
- Red, swollen tonsils, often with white or yellow pus spots (exudate).
- High fever, chills, and tender lymph nodes in the neck.
- Bad breath (halitosis) and voice changes.
3. What Are Tonsil Stones (Tonsilloliths)?
Many adults notice small, foul-smelling white or yellowish debris lodged in the nooks and crannies (crypts) of their tonsils. These are tonsil stones (tonsilloliths).
They are formed when trapped food particles, dead cells, and oral bacteria calcify inside deep tonsillar crypts. While generally harmless, they are a primary cause of chronic bad breath and persistent throat discomfort.
4. When Is Surgical Removal (Tonsillectomy) Indicated?
Surgical removal of the tonsils (tonsillectomy) or adenoids (adenoidectomy) is performed when these tissues shift from being helpful defenders to chronic health liabilities.
According to clinical ENT guidelines, surgical removal is recommended in the following scenarios:
A. Obstructive Sleep Apnea (OSA) & Airway Blockage
When enlarged tonsils or adenoids block the upper airway during sleep, causing loud snoring, restless sleep, mouth breathing, or pauses in breathing (apnea). This is the leading reason for pediatric tonsillectomy.
B. Recurrent Bacterial Infections
When a patient experiences:
- 7 or more documented episodes of tonsillitis in 1 year,
- 5 or more episodes per year for 2 consecutive years, or
- 3 or more episodes per year for 3 consecutive years.
C. Peritonsillar Abscess
A severe complication where infection spreads into the soft tissue surrounding the tonsil, creating a collection of pus that requires urgent drainage or surgical intervention.
D. Suspected Asymmetry or Neoplasm
Unilateral enlargement of one tonsil requiring pathological evaluation.
5. Does Removing Tonsils Harm the Immune System?
No. Extensive medical studies show that removing tonsils or adenoids in patients who meet clinical criteria does not weaken the immune system or increase susceptibility to future infections. The body has hundreds of other lymph nodes throughout the neck and body that easily handle immune surveillance.
If you or your child suffer from frequent throat infections, loud snoring, or trouble swallowing, schedule a consultation with an ENT specialist to evaluate tonsil and adenoid health.
Dr. Karla Sanz
Otolaryngology & Head and Neck Surgery Specialist
Board-certified specialist in the prevention, medical diagnosis, and surgical treatment of ear, nose, throat, and head and neck conditions in Guadalajara and Zapopan.
