Tonsillitis Symptoms and When Is Tonsillitis Dangerous?

Last Updated: 14/9/2026

Tonsillitis symptoms often include a sore throat, pain or difficulty swallowing, redness and swelling of the tonsils, fever, and swollen lymph nodes in the neck. White spots or pus on the tonsils may also appear in some cases. However, the presence of pus or the appearance of the tonsils alone is not enough to determine whether the infection is viral or bacterial, and identifying the cause may require a medical examination and a throat swab.

Difficulty breathing, inability to swallow, or noticeable and rapidly increasing swelling inside the mouth or throat are warning signs that require urgent medical assessment.

This guide provides a comprehensive overview of tonsillitis symptoms, what inflamed tonsils look like, symptoms in adults and children, causes of tonsillitis, the difference between viral and bacterial infections, diagnosis, complications, and when tonsillitis becomes dangerous, while covering treatment only briefly because it is addressed in a separate guide.

 

If the tonsillitis symptoms described in this article are similar to what you are experiencing, you can contact the Magrabi Health team via WhatsApp to ask about your symptoms and learn about the appropriate medical next step for your condition.

Quick Summary

• Common tonsillitis symptoms include sore throat, difficulty swallowing, redness and enlargement of the tonsils, and fever.
• Pus or white spots may appear on the tonsils, but this alone does not confirm a bacterial infection.
• Cough, runny nose, and hoarseness are more commonly associated with some viral infections.
• Symptoms may appear differently in children, especially when a child is unable to clearly describe throat pain.
• Difficulty breathing or swallowing, difficulty opening the mouth, or rapidly increasing throat swelling are warning signs.

What Is Tonsillitis?

Tonsillitis is inflammation of the tonsils located on both sides of the back of the throat. It may cause redness and swelling of the tonsils, pain when swallowing, or throat discomfort. The tonsils are part of the lymphatic system and contribute to the immune response, helping the body respond to microorganisms that enter through the mouth and nose.

Tonsillitis is most commonly caused by a viral infection, although bacterial infections can also be responsible. One of the best-known bacteria associated with infections of the throat and tonsils is group A Streptococcus, or Streptococcus pyogenes.

The severity of tonsillitis can vary from one case to another. Some cases are mild and improve within a few days, while others may cause more noticeable symptoms such as fever, swollen lymph nodes, and white spots or pus on the tonsils. The cause of tonsillitis cannot be accurately determined from the appearance of the tonsils alone, so a doctor may need to examine the throat and perform a test if a bacterial infection is suspected.

What Are the Symptoms of Tonsillitis?

Tonsillitis symptoms vary in severity from one case to another and may include:

• Sore or irritated throat.
• Pain or difficulty swallowing.
• Red tonsils.
• Swollen or enlarged tonsils.
• White or yellow spots in some cases.
• Pus on the surface of the tonsils.
• Fever.
• Swollen or tender lymph nodes in the neck.
• Bad breath.
• Hoarseness or changes in the voice.
• Headache or fatigue.
• Ear pain in some cases.
• Nausea, vomiting, or abdominal pain in some children.

Having one of these symptoms does not necessarily mean that the problem is tonsillitis, as some signs may also occur with pharyngitis, the common cold, and other respiratory infections.

Tonsillitis Symptoms in Adults

Tonsillitis symptoms in adults commonly include:

• Sore or irritated throat.
• Pain or difficulty swallowing.
• Red and swollen tonsils.
• White or yellow spots in some cases.
• Fever.
• Swollen lymph nodes in the neck.
• Headache and fatigue.
• Bad breath.
• Hoarseness or changes in the voice.
• Ear pain in some cases.

Tonsillitis symptoms in adults are generally similar to the overall symptoms of the condition, although their severity and duration may vary depending on the cause of the infection and the patient's general health.

Tonsillitis Symptoms in Children

Tonsillitis symptoms in children are similar to those experienced by adults, although younger children may not be able to clearly describe throat pain or difficulty swallowing.

Parents may notice:

• Refusal to eat or drink.
• Crying or discomfort when swallowing.
• Drooling because swallowing is difficult.
• Reduced appetite.
• Irritability or lethargy.
• Fever.
• Bad breath.
• Swollen lymph nodes in the neck.
• Headache.
• Nausea or vomiting.
• Abdominal pain in some cases of streptococcal infection.

For this reason, assessing tonsillitis in children depends not only on how the child describes the pain, but also on their ability to eat, drink, and breathe, as well as any noticeable changes in behavior.

What Can You Notice About the Appearance of Inflamed Tonsils?

Inflamed tonsils may look different from healthy tonsils in several ways. They may become more red or swollen, and white or yellow spots or discharge may appear on their surface.

Sign	Normal Tonsils	Inflamed Tonsils
Color	Usually pink	More noticeable redness
Size	No obvious swelling	Enlargement or swelling may be present
Surface	No obvious discharge	White or yellow spots or discharge may appear
Swallowing	No tonsil-related pain	Swallowing may become painful or difficult
Lymph nodes	No painful swelling	May become tender or enlarged

It is also important to note that images of tonsillitis in adults should not be used to diagnose the condition yourself, because an image alone cannot identify the cause of the inflammation. A specialist should be consulted.

What Does Pus on the Tonsils Look Like in Pictures?

Pus on the tonsils typically appears as white or yellow spots or a coating covering part of the tonsil surface. It may be accompanied by redness and swelling of the tonsils, pain when swallowing, or fever.

However, the presence of pus does not necessarily mean that the infection is bacterial. Some viral infections can resemble bacterial infections in the appearance of the throat. Pus should also be distinguished from tonsil stones, which usually appear as small white or yellowish lumps within the tonsil crypts and may not be accompanied by fever or acute inflammation.

If white spots on the tonsils appear with fever, or white spots on the tonsils are accompanied by pain, particularly with difficulty swallowing, increasing swelling, or worsening symptoms, medical assessment is recommended to determine the cause rather than relying on the appearance of the tonsils alone.

What Are the Symptoms of Pus on the Tonsils?

Symptoms associated with pus on the tonsils may include:

• Sore throat.
• Pain when swallowing.
• Swollen and red tonsils.
• White or yellow spots or discharge.
• Fever in some cases.
• Swollen lymph nodes.
• Bad breath.

The presence of pus alone cannot be used to determine which microorganism is causing the infection.

When Is Tonsillitis Dangerous?

Tonsillitis may become more serious when symptoms affect breathing or swallowing, or when severe swelling or rapidly worsening pain develops. Certain signs may also indicate complications such as a peritonsillar abscess and require urgent medical assessment.

Urgent medical care is needed if any of the following occur:

• Difficulty breathing.
• Inability to swallow or very severe difficulty swallowing.
• Drooling because of an inability to swallow.
• Rapid or noticeable swelling inside the mouth or throat.
• Severe pain that worsens quickly.
• Difficulty opening the mouth.
• Significant difficulty speaking or a marked change in the voice.
• Severe pain and swelling concentrated on one side of the throat.

The NHS notes in its article on tonsillitis that severe throat pain that worsens quickly, especially when accompanied by swelling in the mouth or throat or difficulty speaking, swallowing, breathing, or opening the mouth, may indicate a peritonsillar abscess and requires urgent medical assessment.

When Is Tonsillitis Dangerous in Adults?

To understand when tonsillitis is dangerous in adults, attention should be paid to the severity of tonsillitis symptoms rather than only to the appearance of the tonsils.

Prompt medical assessment is recommended if there is:

• Difficulty breathing.
• Inability to swallow liquids or saliva.
• Severe pain that becomes worse on one side of the throat.
• Difficulty opening the mouth.
• Noticeable swelling inside the mouth or neck.
• Rapid worsening of symptoms.

It is also advisable to see a doctor if symptoms do not improve within about a week, or if episodes recur frequently enough to affect eating, sleeping, or daily activities.

When Is Tonsillitis Dangerous in Children?

The answer depends largely on the child's ability to breathe, swallow, and maintain adequate fluid intake. Immediate medical assessment is needed if there is:

• Difficulty breathing or swallowing.
• Noticeable drooling because swallowing is difficult.
• Refusal to drink fluids.
• Signs of dehydration.
• Marked lethargy.
• Persistent symptoms without improvement.
• Noticeably recurrent sore throats.

The Saudi Ministry of Health explains in its article “Sore Throat in Children” that difficulty breathing or swallowing, excessive drooling in young children, signs of dehydration, and a sore throat lasting more than one week are reasons to consult a doctor. The Ministry also advises immediate medical review if a child is younger than three months and has a fever.

 

If tonsillitis symptoms persist or are accompanied by difficulty swallowing or other throat-related symptoms, you can learn more about Magrabi Health's Laryngology and Speech Therapy service and the conditions assessed and medical services available.

What Causes Tonsillitis?

Magrabi doctors consider the main causes of tonsillitis to fall into two categories: viral infections and bacterial infections.

Viral Infections

Viruses are the most common cause of many cases of throat and tonsil inflammation. Certain signs may be more suggestive of a viral cause, including:

• Cough.
• Runny nose.
• Hoarseness.
• Conjunctivitis in some cases.

Bacterial Infections

Tonsillitis can also be caused by bacterial infection. Group A Streptococcus is among the most important bacteria associated with infections of the throat and tonsils.

The Egyptian Ministry of Health and Population – Preventive Medicine Sector explains in its publication on group A Streptococcus that Streptococcus pyogenes may be present in the throat and can cause tonsillitis and pharyngitis. It is also one of the common causes of bacterial pharyngitis in school-aged children.

What Is the Difference Between Bacterial and Viral Tonsillitis?

Symptoms of bacterial tonsillitis may overlap with those of viral tonsillitis, so a single sign cannot reliably distinguish between them.

Sign	Viral Infection May Be Associated With	Streptococcal Infection May Be Associated With
Sore throat	Common	Common and may begin suddenly
Fever	Possible	Common
Pain when swallowing	Possible	Common
Swollen tonsils	Possible	Possible
Pus	May occur	May occur
Cough	More associated with viral infections	Less common
Runny nose	More associated with viral infections	Less common
Hoarseness	May occur	Less associated with streptococcal infection
Swollen neck lymph nodes	Possible	May be more noticeable

The Egyptian Ministry of Health and Population explains in its publication on group A Streptococcus that streptococcal pharyngitis may present with sudden onset of sore throat, fever, pain when swallowing, tonsillitis, and enlarged anterior cervical lymph nodes.

The CDC also explains in its clinical guidance that when clear viral symptoms are absent, clinical examination alone may not always be enough to distinguish a viral infection from a streptococcal infection, and testing may be required.

What Are the Types of Tonsillitis?

Tonsillitis can be classified according to how it develops, how long it lasts, and whether it recurs.

Acute Tonsillitis

Acute tonsillitis is inflammation that begins over a short period and commonly causes sore throat, fever, difficulty swallowing, and swollen tonsils. It may result from either a viral or bacterial infection.

Recurrent Tonsillitis

Recurrent tonsillitis refers to repeated episodes of tonsillitis occurring at relatively close or repeated intervals. Assessment depends on the number and severity of episodes and their impact on eating, sleeping, and everyday life.

Chronic Tonsillitis

Chronic tonsillitis refers to symptoms that persist or recur over a prolonged period. It may be accompanied by recurrent throat pain, bad breath, or persistent discomfort. These cases require medical assessment to determine the cause and exclude other conditions.

Is Tonsillitis Contagious?

Yes, the infection that causes tonsillitis can be contagious, particularly when the cause is viral or bacterial. Tonsillitis itself is inflammation and does not spread from one person to another; instead, the viruses or bacteria responsible for it can spread.

The infection may spread through:

• Droplets produced by coughing or sneezing.
• Close contact with an infected person.
• Sharing cups, eating utensils, or drinking utensils.
• Touching contaminated surfaces and then touching the mouth or nose.
• Direct exposure to respiratory secretions.

To reduce the spread of infection, wash your hands regularly, cover your mouth and nose when coughing or sneezing, avoid sharing personal items, and limit close contact when fever or clear symptoms of infection are present.

What Is the Difference Between a Sore Throat and Tonsillitis?

The difference between a sore throat and tonsillitis is that a sore throat is a broader description of pain or inflammation in the pharyngeal area, while tonsillitis specifically refers to inflammation of the tonsil tissue.

Sore Throat or Pharyngitis	Tonsillitis
Affects the throat or pharynx	Concentrated in the tonsils
Can have infectious and non-infectious causes	Often associated with a viral or bacterial infection
Tonsil enlargement is not required	Noticeable enlargement and redness may occur
White spots on the tonsils are not required	Spots or discharge may appear in some cases

Pharyngitis and tonsillitis may occur at the same time.

How Is Tonsillitis Diagnosed?

Tonsillitis is usually diagnosed by first reviewing the symptoms and how long they have been present, followed by examination of the mouth, throat, and tonsils. The doctor looks for redness, swelling, or white spots and may also examine the lymph nodes in the neck.

Diagnosis may include:

• Clinical examination: To assess the appearance of the tonsils, the degree of swelling, and the presence of pus or discharge.
• Review of associated symptoms: Such as fever, cough, runny nose, difficulty swallowing, or swollen lymph nodes.
• Rapid strep test: Used when a bacterial infection caused by group A Streptococcus is suspected.
• Throat culture: The doctor may request this to confirm a bacterial infection when more precise diagnosis is needed.

The cause of tonsillitis cannot be determined from the appearance of the throat alone because viral and bacterial infections can cause similar symptoms. The final diagnosis therefore depends on the clinical examination, symptoms, and testing when required.

What Are the Complications of Tonsillitis?

Most cases do not lead to serious complications, although complications can occur in some severe or recurrent infections.

Peritonsillar Abscess

A tonsillar abscess, or peritonsillar abscess, is a collection of pus in the tissues next to one of the tonsils. Symptoms may include:

• Severe throat pain.
• Pain that is more pronounced on one side.
• Difficulty swallowing.
• Difficulty opening the mouth.
• Voice changes.
• Swelling of the mouth or throat.
• Difficulty breathing in severe cases.

A suspected peritonsillar abscess requires prompt medical assessment.

Other Complications

These may include:

• Spread of infection to surrounding tissues.
• Dehydration due to difficulty drinking fluids.
• Sleep-related breathing problems when the tonsils are severely or persistently enlarged.
• Some complications related to streptococcal infection, such as rheumatic fever.
• Post-streptococcal glomerulonephritis in some cases.

Mayo Clinic lists peritonsillar abscess, spread of infection to surrounding tissues, and sleep-disordered breathing among the possible complications associated with some cases of tonsillitis in its article “Tonsillitis: Symptoms & Causes.”

How Is Tonsillitis Treated?

Treatment depends on the cause and severity of the inflammation. In many viral infections, care focuses on rest, drinking fluids, and relieving symptoms in a way that is appropriate for the patient's age and overall health. Antibiotics are not used to treat viral infections and are prescribed when a doctor identifies a bacterial infection that requires them.

Hamad Medical Corporation in Qatar states in its publication “Avoid Using Antibiotics to Treat Viral Sore Throat” that antibiotics target bacteria rather than viruses, and that inappropriate use can contribute to antibiotic resistance. Antibiotics should therefore not be selected based only on the presence of pus on the tonsils or the appearance of the throat.

How Can the Spread of Infection Be Reduced?

The spread of infections associated with the throat and tonsils can be reduced by:

• Washing hands thoroughly and regularly.
• Covering the mouth and nose when coughing or sneezing.
• Disposing of used tissues.
• Avoiding sharing cups, eating utensils, or drinking utensils.
• Limiting close contact while symptoms of infection are present.
• Following medical advice when a bacterial infection has been diagnosed.

The Saudi Ministry of Health recommends teaching children to wash their hands, use tissues when coughing or sneezing, and avoid direct contact with people who have respiratory infections.

When Should You See an ENT Doctor?

Medical assessment is recommended if symptoms:

• Are severe or become worse rather than improving.
• Make eating or drinking difficult.
• Continue for about a week without improvement.
• Recur noticeably.
• Are accompanied by persistent enlargement of the tonsils.
• Affect breathing or sleep.
• Are difficult to distinguish from another throat problem.

Difficulty breathing, inability to swallow, rapidly increasing swelling of the mouth or throat, or difficulty opening the mouth require urgent medical attention.

If tonsillitis symptoms are severe or recurrent, an ENT doctor can assess the tonsils and throat and determine whether further testing or follow-up is needed.

 

If tonsillitis symptoms persist or recur, or affect swallowing, breathing, or sleep, it is advisable to have the condition assessed by a specialist. You can book an appointment with Magrabi doctors through the online booking form or by phone to select a suitable appointment and determine the most appropriate medical next step for your condition.

Conclusion

Tonsillitis symptoms can range from mild throat pain and difficulty swallowing to fever, enlarged tonsils and lymph nodes, and the appearance of white spots or pus. The appearance of inflamed tonsils or the presence of pus alone cannot determine whether the infection is viral or bacterial.

Knowing when tonsillitis becomes dangerous is just as important as recognizing the symptoms. Difficulty breathing, inability to swallow, rapidly increasing swelling inside the throat, or difficulty opening the mouth require urgent medical assessment. If symptoms persist, episodes recur, or the condition affects eating or sleep, an ENT examination can help identify the cause and determine the appropriate next step.

 

Reviewed by the Magrabi editorial team with the support of specialist doctors.

Disclaimer: This article is for health education purposes only and is not a substitute for consultation with a qualified medical professional.

Medical References

• Saudi Ministry of Health – Sore Throat in Children
• Egyptian Ministry of Health and Population – Group A Streptococcal: Important Facts About the Disease
• Hamad Medical Corporation – Avoid Using Antibiotics to Treat Viral Sore Throat
• CDC – Clinical Guidance for Group A Streptococcal Pharyngitis
• Mayo Clinic – Tonsillitis: Symptoms & Causes
• NHS – Tonsillitis