A sore throat is one of the most common reasons people feel unwell. It may begin as a scratchy sensation, discomfort when swallowing or a dry, irritated feeling and is often associated with a cold or another respiratory infection.
Most sore throats are caused by viral infections and improve without specific medical treatment. However, bacterial infections and other conditions can also cause throat pain, and certain symptoms warrant medical assessment.
Knowing the common sore throat causes, what you can reasonably manage at home and when to see a doctor for a sore throat can help you respond appropriately when symptoms appear.
What Causes a Sore Throat?
A sore throat, sometimes called pharyngitis, occurs when the throat becomes irritated or inflamed.
Infections are a common cause, particularly viruses associated with:
- The common cold
- Influenza
- COVID-19
- Other respiratory illnesses
Bacterial infections can also affect the throat. One example is strep throat, which is caused by group A streptococcus bacteria.
Not every sore throat is caused by an infection. Other possible contributors can include irritation, allergies, reflux and environmental factors.
Because different conditions can produce similar symptoms, the cause is not always obvious from throat pain alone.
What Does a Typical Sore Throat Feel Like?
Symptoms vary depending on the cause.
You may experience:
- Pain or irritation in the throat
- Discomfort when swallowing
- A dry or scratchy throat
- Redness at the back of the throat
- Swollen or tender glands
- A hoarse voice
When the sore throat is associated with a respiratory infection, you may also experience symptoms such as:
- Runny or blocked nose
- Cough
- Sneezing
- Fever
- Headache
- Tiredness
- Muscle aches
The combination of symptoms can help your GP assess what may be causing the problem.
Viral vs Bacterial Sore Throats: What’s the Difference?
Both viruses and bacteria can cause throat infections, and distinguishing between them based on symptoms alone can sometimes be difficult.
Healthdirect explains that bacterial and viral infections can produce similar symptoms, which means examination and, in some cases, testing may be required to determine the cause.
Viral Sore Throats
Viral infections are a common cause of sore throat.
A viral illness may occur alongside:
- Cough
- Runny nose
- Sneezing
- Fatigue
- Fever
- Other cold or flu-like symptoms
Antibiotics do not treat viral infections. Depending on the illness, management may instead focus on rest, fluids and symptom relief.
Bacterial Sore Throats
Bacterial infections can also cause a sore throat.
Strep throat is one example. Because bacterial and viral infections may look similar, a healthcare professional may need to assess your symptoms and sometimes perform a throat swab or other test.
Antibiotics may be prescribed for some bacterial infections when clinically appropriate.
Does a Sore Throat Mean You Need Antibiotics?
No.
Because many sore throats are caused by viruses, antibiotics are often unnecessary.
Antibiotics work against bacteria rather than viruses. Healthdirect advises that doctors prescribe antibiotics when they believe they are likely to be beneficial for a bacterial infection.
Taking antibiotics when they are not needed does not make a viral infection resolve faster and contributes to antibiotic resistance.
If your GP suspects a bacterial infection, they can determine whether testing or antibiotic treatment is appropriate.
Could Tonsillitis Cause a Sore Throat?
Yes.
Tonsillitis is inflammation and infection of the tonsils, which sit at the back of the throat.
Symptoms can include:
- Sore throat
- Pain when swallowing
- Red or swollen tonsils
- Fever
- Swollen lymph nodes
- Feeling generally unwell
Tonsillitis can be caused by viruses or bacteria, so the presence of swollen tonsils does not automatically mean antibiotics are required. Healthdirect identifies tonsillitis as one of several throat conditions that may require assessment depending on the symptoms and severity.
What About Sore Throats in Children?
Sore throats are also common in children, particularly when respiratory infections circulate through schools and childcare settings.
Children may not always describe their symptoms clearly. Parents might instead notice:
- Reluctance to eat or drink
- Pain when swallowing
- Fever
- Irritability
- Reduced energy
- Swollen glands
- Cough or runny nose
Children with breathing difficulties require urgent medical attention. Healthdirect advises calling triple zero (000) if a child is having difficulty breathing.
Young children who appear significantly unwell or are having difficulty drinking should also be assessed promptly.
How Long Should a Sore Throat Last?
The duration depends on the underlying cause.
A sore throat associated with a minor viral respiratory infection will generally improve as the infection resolves. However, there is no single timeframe that applies to every person or every cause.
Rather than focusing only on the number of days, pay attention to the overall pattern.
Consider medical assessment if your sore throat:
- Is not improving
- Continues to worsen
- Keeps returning
- Is unusually severe
- Is accompanied by other concerning symptoms
Healthdirect recommends medical review when cold, influenza or COVID-19 symptoms are not improving or are getting worse.
When Does a Persistent Sore Throat Need Assessment?
A persistent sore throat should not automatically be assumed to be a lingering infection.
Repeated or prolonged throat symptoms can have several potential explanations and may require a GP assessment to determine the cause.
Arrange an appointment if you have a sore throat that:
- Persists longer than expected
- Frequently returns
- Is becoming progressively worse
- Makes swallowing increasingly difficult
- Is accompanied by persistent hoarseness
- Occurs alongside unexplained weight loss
- Is associated with a persistent lump or swelling
- Does not follow the pattern of a typical respiratory illness
Healthdirect notes that throat symptoms can be associated with a range of conditions, from common viral and bacterial infections to less common but more serious disorders.
Persistent symptoms do not necessarily mean something serious is wrong, but they deserve appropriate investigation.
When Should You See a Doctor for a Sore Throat?
A GP can assess your throat and determine whether your symptoms are consistent with a common viral illness or require further investigation.
Consider booking an appointment if:
- Your symptoms are not improving or are worsening
- You have a persistent or recurring sore throat
- You have significant difficulty swallowing
- You have a high or persistent fever
- You are concerned about swollen glands
- Symptoms are interfering significantly with eating or drinking
- You have another medical condition that may increase your risk of complications
- You are simply concerned about the severity or pattern of your symptoms
For non-emergency health problems, Healthdirect recommends seeing a GP as an appropriate first point of care.
When Is a Sore Throat an Emergency?
Some symptoms require urgent medical attention rather than waiting for a routine GP appointment.
Seek urgent medical care if you or someone you are caring for has:
- Significant difficulty breathing
- Severe breathing problems
- Signs of a serious or rapidly worsening illness
- An inability to safely swallow
- Severe symptoms that are rapidly deteriorating
Healthdirect advises calling triple zero (000) for serious illness involving difficulty breathing or other potentially life-threatening symptoms.
How Does a GP Assess a Sore Throat?
Your GP will usually begin by asking about your symptoms.
They may want to know:
- When the sore throat started
- Whether symptoms are improving or worsening
- Whether you have a fever
- Whether you are coughing
- Whether you have nasal symptoms
- Whether swallowing is difficult
- Whether anyone around you has been unwell
- Whether you have experienced similar episodes previously
Your GP may examine your mouth, throat and tonsils and check for swollen lymph nodes.
Because viral and bacterial infections can cause similar symptoms, Healthdirect notes that doctors may sometimes organise tests such as a throat or nasal swab when determining the cause of an infection.
Testing is not necessary for every sore throat.
What Sore Throat Treatment May Be Recommended?
Appropriate sore throat treatment depends on the cause and severity.
For uncomplicated viral illnesses, symptom management may involve:
- Rest
- Drinking adequate fluids
- Appropriate pain relief
- Other supportive measures recommended by a healthcare professional
Healthdirect notes that paracetamol or ibuprofen may be recommended for pain and fever associated with viral respiratory illnesses, depending on the individual’s circumstances.
Always follow the directions on medicines and ask your pharmacist or GP if you are unsure whether a medication is appropriate for you or your child.
If a bacterial infection is diagnosed, your doctor can determine whether antibiotics are needed.
Why Recurring Sore Throats Are Worth Discussing With Your GP
Having several episodes of throat pain does not necessarily mean there is a serious underlying condition.
However, recurring symptoms provide useful information.
A GP can consider whether repeated sore throats may relate to:
- Recurrent respiratory infections
- Tonsil problems
- Allergies or environmental irritation
- Reflux
- Other medical conditions
Keeping track of when symptoms occur and whether they are associated with fever, cough, swallowing problems or other symptoms can help during your appointment.
The goal is not simply to repeatedly treat the discomfort but to understand why the problem keeps happening.
Can You Reduce the Spread of Infectious Sore Throats?
Many infections that cause sore throats spread through respiratory droplets or contact with contaminated hands and surfaces.
Healthdirect recommends measures such as:
- Washing your hands regularly
- Coughing or sneezing into your elbow
- Using and disposing of tissues appropriately
- Avoiding sharing cups, drink bottles or cutlery
These simple hygiene practices can help reduce the spread of both bacterial and viral infections.
Frequently Asked Questions
How long should a sore throat last?
The duration depends on the cause. Many sore throats associated with minor viral illnesses improve as the infection resolves. If your symptoms are not improving, become worse or repeatedly return, consider discussing them with your GP.
When should I see a doctor for a sore throat?
Consider seeing a doctor if the sore throat is persistent, worsening, unusually severe, keeps returning or is accompanied by concerning symptoms such as significant difficulty swallowing or a high fever. Seek urgent medical attention for serious breathing difficulties.
Can a sore throat be caused by an infection?
Yes. Both viruses and bacteria can cause throat infections. Colds, influenza and other respiratory viruses commonly cause sore throats, while bacterial infections such as strep throat can also occur.
Does a sore throat need antibiotics?
Not always. Antibiotics only treat bacterial infections and do not work against viral infections. Your doctor can determine whether antibiotics are appropriate based on your symptoms and clinical assessment.
Why does my sore throat keep coming back?
Recurring sore throats can have several potential causes, including repeated infections, tonsil problems, environmental irritation and other conditions. A GP can review the pattern of symptoms and determine whether further assessment is appropriate.
Should I see a GP for a persistent sore throat?
Yes, particularly if symptoms are not resolving as expected, repeatedly return or occur with other concerning changes. Persistent throat symptoms can have many causes, and medical assessment can help determine whether further investigation is needed.
The Bottom Line
A sore throat is usually associated with a minor infection and often improves with time and supportive care. However, not every sore throat has the same cause.
Both viral and bacterial infections can cause throat pain, and symptoms alone may not always make the difference obvious. Antibiotics are not appropriate for viral illnesses, which is why assessment may be important when symptoms are severe, persistent or worsening.
If you have a persistent sore throat, recurring episodes or symptoms that concern you, speak with your GP. They can assess possible causes, determine whether testing is needed and recommend sore throat treatment appropriate to your individual circumstances.
