Common Tonsillitis Causes: Causes, Diagnosis And Treatment Of Common Tonsillitis
Learn about the common causes, diagnosis, and treatment options for tonsillitis. Explore how this condition affects the tonsils and how it can be managed effectively.
Written by Dr. Rohinipriyanka Pondugula
Reviewed by Dr. Siri Nallapu MBBS
Last updated on 3rd Jun, 2026
Tonsillitis is a medical condition where the tonsil glands inflame due to infectious pathogens, allergens, or the body’s reverse immune response. Pain, discomfort, difficulty swallowing, sore throat, and fever are common symptoms. As the tonsil gland acts as the first line of defence for our body by flushing out pathogens and toxic substances entering through the mouth, maintaining its health is crucial. Besides, the glands produce lymphocytes, which are integral to the body’s immune system. Hence, understanding tonsillitis and its symptoms is important.
Understanding Tonsillitis
Tonsillitis is inflammation of the tonsil gland, often accompanied by tenderness, redness, and white patches. It can be caused by bacterial or viral infections, allergies, and several other environmental factors, like exposure to air-borne pollutants, a long-term habit of smoking, and seasonal weather variations.
Some of the most common symptoms of tonsillitis are:
Sore throat
Low-grade fever for viral infections and high fever for bacterial infections
Difficulty in swallowing food or water
Discomfort and pain
Swollen lymph nodes
Tender tonsil glands with redness
Bad breath, also known as halitosis
Referred pain in the ear
Headache and fatigue
Loss of appetite
Consult Top ENT Specialists
Bacterial Infections Causing Tonsillitis
There are many bacteria causing tonsillitis, and some of the most common ones are:
1. Streptococcus Pyogenes
Belonging to the family of Group A Streptococcus, Streptococcus pyogenes cause both tonsillitis and strep throat. It is highly contagious and often requires medicine to alleviate the symptoms.
Some of the most common symptoms are:
Severe sore throat
Red and tenderised tonsil glands
Swollen and enlarged lymph nodes
High-grade fever with a body temperature of more than 101°F
Headache and body fatigue
Scarlet fever rash
Apart from Streptococcus pyogenes, some other bacterial species causing tonsillitis are:
Group C and Group G Streptococci
Staphylococcus aureus
Mycoplasma pneumonia
Neisseria gonorrhoea
Corynebacterium diphtheriae
2. Viruses Causing Tonsillitis
Some common viruses causing tonsillitis are:
3. Adenovirus
Adenovirus causes upper respiratory tract infection, leading to the inflammation of the tonsil glands. It spreads through mucus droplets in the air or by direct contact with infected surfaces. A few symptoms that people often experience when infected with adenovirus are:
Prominent to severe sore throats
No pus secretion from the inflamed tonsil glands
Persistent cough
Runny and stuffy nose with mucus discharge
Low to moderate fever
Enlarged lymph nodes but with low-grade tenderness
Conjunctivitis or pink eye
4. Epstein-Barr virus and Mononucleosis
Another virus causing tonsillitis is the Epstein-Barr virus, often termed infectious mononucleosis. The most common transmission method is through the exchange of saliva with the infected person. It targets the throat and the surrounding lymphatic nodes, thereby activating the immune system and leading to inflammation of the tonsil glands. Some of the symptoms of mononucleosis are:
Severe sore throat
Enlarged and reddened tonsil glands
Prolonged fever
Tender lymph nodes in the neck and groin
Persistent fatigue
Difficulty in swallowing
Enlarged spleen gland with risks of ruptures
5. Other Viral Culprits
Some other viruses causing tonsillitis are:
Influenza virus
Coxsackievirus
Herpes Simplex Virus
Rhinovirus
Parainfluenza virus
Varicella Zoster virus
Risk Factors for Developing Tonsillitis
Some people are more susceptible to getting tonsillitis than others, and these are:
1. Age-Related Susceptibility
Tonsillitis is common in children between the ages of 3 and 15 because their immune systems are still developing and cannot easily fight off infections. Teenagers are moderately susceptible to tonsillitis caused by Group A Streptococcus. With age, the susceptibility to tonsillitis decreases further as the immune system strengthens and prevents infections.
2. Environmental and Lifestyle Factors
Sometimes, environmental and lifestyle factors can also lead to tonsillitis, such as:
Exposure to allergens
Continuous use of tobacco
Dry weather conditions
Unpredictable changes in the weather conditions
Too much air pollution
Diagnosis of Tonsillitis
The diagnosis of tonsillitis has two phases –
Phase 1: Physical Examination and Symptoms
Doctors listen to patients' symptoms and examine their tonsil glands to determine tenderness and inflammation. They may use a probe with a camera to examine the internal structure of the inflamed tonsil glands and detect redness and white patches.
Phase 2: Laboratory Tests and Throat Cultures
Some of the most common laboratory tests used for the prognosis of tonsillitis are:
Throat culture for Streptococcus pyogenes
Rapid antigen detection test
Polymerase chain reaction test
Complete blood count
Monospot test for Epstein-Barr virus
Viral culture and throat swabs
Depending on the lab test results and physical examination, the doctor will provide information on the current situation of the tonsillitis and start treatment accordingly.
Treatment Options for Tonsillitis
For bacterial, viral, and environmental infections that cause tonsillitis, the doctor prescribes antibiotics to improve the body’s immune response and ability to fight pathogens. Sometimes, anti-inflammatory steroids are also given to reduce the inflammation of the tonsil glands and alleviate the pain and discomfort.
On the other hand, some of the best home remedies for the treatment of tonsillitis and improvement of the overall health are:
Gargling with warm water and salt mixed together for 30 seconds every day
Using lemon and honey together to improve the body’s immune response
Drinking herbal teas with antimicrobial and anti-inflammatory substances, like chamomile and peppermint tea
Drinking warm broths and soups to keep the body hydrated and reduce the discomfort caused by tonsillitis
Prevention of Tonsillitis
Following certain healthy practices at home and when outside can prevent tonsillitis:
Washing hands before and after eating or after touching any infected surface
Minimising touching of face and eyes
Using hand sanitisers in places where washing hands isn’t possible
Covering your mouth and nose during sneezing and coughing
Avoiding close contact with infected people
Eating a balanced diet to improve the body’s immune power
Simultaneously, vaccinations can help reduce the risks of tonsillitis by improving your body’s immune system, like:
Influenza shots
Measles, Mumps, and Rubella (MMR) vaccine
Pneumococcal vaccine
Diphtheria, Tetanus, and Pertussis vaccine
Human Papillomavirus vaccine
Complications of Untreated Tonsillitis
If left untreated, tonsillitis, like any other disease, will become chronic. It will persist for a longer period and often recur from time to time. Also, tonsil stones can form if the acute condition if not treated from the beginning.
Additionally, some of the major health impacts caused by untreated tonsillitis are:
Abscess formation
Sinusitis
Persistent inflammation
Tonsil stones
Rheumatic fever
Post-streptococcal Glomerulonephritis
Scarlet fever
Sleep apnoea
Conclusion
Tonsillitis is a common yet potentially serious condition that affects people of all ages, particularly children and teenagers. Understanding its causes, symptoms, and risk factors is crucial for early detection and effective treatment. And, if left untreated, tonsillitis can lead to chronic inflammation and severe health complications. Therefore, by maintaining a healthy lifestyle and taking necessary precautions, individuals can protect themselves from recurrent infections and ensure overall well-being.
Consult Top ENT Specialists
Consult Top ENT Specialists
Dr. Tanvi Choubey
Ent Specialist
7 Years • MBBS, MS (ENT). Fellowship in Head Neck Onco Surgery . Consultant - ENT
Rourkela
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Dr. Kinjal Shankar Majumdar
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Kolkata
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Dr. Agalya Pauline Vasanthi. L
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Chennai
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Dr. Saurabh Pachauri
Ent Specialist
18 Years • MMBS, DLO(ENT), DNB(ENT)
Indore
Apollo Hospitals Vijay Nagar, Indore
Dr. G. Amrutha
Ent Specialist
10 Years • DAA(diploma in allergy and asthma)(CMC vellore ) 2025 DNB ENT 2016 MS ENT Head and Neck Surgery 2015 MBBS (Siddhartha medical college)
Hyderabad
Apollo Hospitals Jubilee Hills, Hyderabad
Consult Top ENT Specialists
Dr. Tanvi Choubey
Ent Specialist
7 Years • MBBS, MS (ENT). Fellowship in Head Neck Onco Surgery . Consultant - ENT
Rourkela
Apollo Hospitals, Rourkela, Rourkela
Dr. Kinjal Shankar Majumdar
Head, Neck and Thyroid Cancer Surgeon
16 Years • M.B.B.S., MS (ENT & Head and Neck Surgery), MCh (Head and Neck Surgery and Oncology) & Robotic Surgery
Kolkata
Apollo Hospitals, Narendrapur, Kolkata, Kolkata
Dr. Agalya Pauline Vasanthi. L
Ent Specialist
5 Years • MBBS, , DNB (ENT), Expert certificate course in Neurotology 2022,Fellowship in Diabetology
Chennai
Apollo Hospitals Greams Road, Chennai
Dr. Saurabh Pachauri
Ent Specialist
18 Years • MMBS, DLO(ENT), DNB(ENT)
Indore
Apollo Hospitals Vijay Nagar, Indore
Dr. G. Amrutha
Ent Specialist
10 Years • DAA(diploma in allergy and asthma)(CMC vellore ) 2025 DNB ENT 2016 MS ENT Head and Neck Surgery 2015 MBBS (Siddhartha medical college)
Hyderabad
Apollo Hospitals Jubilee Hills, Hyderabad
