Sore throat: causes, remedies, and when to get help 

What exactly is a sore throat?

A sore throat is a irritation in the back of the mouth and neck causing pain and discomfort. The symptom is primarily driven by your body's immune response to an infection or an external irritant, which causes the local tissues to swell.

Understanding pharyngitis

A sore throatis pain, scratchiness, or irritation of the throat that often worsens when you swallow. It’s often caused by pharyngitis, which is inflammation of the pharynx: the muscular tube located at the back of your throat. Most sore throats are caused by viruses, such as colds or flu. Less often they are caused by bacteria, allergies or irritants like smoke, dry air or acid reflux. In response,, your body increases blood flow and sends immune cells to the area, which can make the tissues red, swollen and sensitive. This can feel scratchy, raw, burning, or very painful, and can make it uncomfortable to eat, drink, or speak comfortably.

woman in t shirt feeling either side of neck

Causes: viral, bacterial, or other

A sore throat is most commonly viral, though it can also be bacterial or caused by environmental factors like allergies. Knowing the underlying cause helps determine the right approach to treatment.

Viral infections

The vast majority of sore throats are caused by viruses, most often the exact same ones that cause the common cold or the flu. The most frequent viral culprits include rhinovirus (the common cold), influenza, and coronaviruses. According to the NHS, these viral infections are self-limiting. This means your immune system will clear them on its own over time, and they do not respond to antibiotics.

Bacterial infections and strep throat

A less common but typically more severe type of sore throat is caused by Streptococcus pyogenes bacteria. This is often called strep throat. When the infection mainly affects the tonsils, it's known as bacterial tonsillitis, although most tonsillitis is caused by viruses. The classic signs that suggest a bacterial infection include a sudden and severe sore throat, intense pain when swallowing, a high temperature, swollen lymph nodes in the neck, and white pus-filled patches on the tonsils. Crucially, strep throat often presents without a cough.

To help decide if a bacterial infection is likely, doctors often use a scoring system based on your symptoms, such as the Centor or FeverPAIN criteria. As outlined by NICE guidance, this involves checking for specific clinical signs to calculate a score, which helps the clinician decide whether antibiotics are likely to help..

Viral vs bacterial vs allergies

Comparing your exact symptoms can give you a strong clue about the cause of your discomfort.

Symptom

Viral sore throat (e.g. a cold)

Strep Throat (Bacterial)

Sore Throat from Allergies

Onset

Gradual, over a day or 2

Sudden and severe

Variable, often seasonal

Cough

Very common

Usually absent

Sometimes a dry tickle

Fever

Mild or absent

Often present

Absent

Throat Appearance

Red and mildly swollen

Very red, often with white patches

Normal or slightly irritated

Other Symptoms

Runny nose, sneezing, aches

Swollen neck glands, headache,

Itchy eyes, sneezing, clear mucus

 

Other common causes

While infections are the main trigger, several other factors can irritate the pharynx.

Allergies and post-nasal drip: Allergic reactions to pollen, dust, or pet dander can cause your body to produce excess mucus. This mucus drips down the back of your throat (post-nasal drip), constantly irritating the tissue and causing a persistent scratchy feeling.

Gastro-oesophageal reflux disease (GORD): If you have acid reflux, stomach acid can travel up into the oesophagus and spill over to irritate the throat. This is especially common at night when you are lying flat, leading to a hoarse voice and a sore throat in the morning.

Environmental factors: Dry air, cigarette smoking, and heavy air pollution can all dry out and inflame the delicate lining of the throat over time.

Home remedies for a sore throat

To soothe a sore throat at home, you can use remedies like salt water gargles, warm fluids, and steam to reduce inflammation, soothe irritated tissues, and keep the throat moist.

How self-care works

The NHS recommends simple self-care, such as rest and plenty of fluids, to ease symptoms at home. When your throat is inflamed, the tissue is swollen and more sensitive to dryness and irritation. Home remedies don't cure the infection, which usually clears up on its own, but they can make you more comfortable. They're thought to work by reducing swelling (such as salt water gargles), soothing and coating the throat (such as honey or lozenges), or keeping the throat moist so it feels less sore.

Salt water gargles

A warm salt water gargle is a highly effective way to alleviate discomfort. Salt are thought to help by drawing out excess fluid from the inflamed tissues, which temporarily reduces the swelling and eases the pain.

Start by dissolving half a teaspoon of salt in a glass of warm water.

  1. Take a large sip of the salt water.
  2. Tilt your head back slightly.
  3. Gargle the liquid at the back of your throat for roughly 30 seconds.
  4. Spit it out into the sink.

Repeat these steps until the glass is empty. Gargling isn’t suitable for young children.

Hydration with warm and cold liquids

Keeping the throat lining thoroughly moist prevents further irritation and helps your body fight the infection. The temperature of the liquids you choose is entirely a matter of personal preference for comfort. Warm drinks, such as herbal tea with honey or clear warm soups, can relax the throat muscles and soothe raw tissue. Conversely, cold items like chilled water or ice lollies can reduce the sensation of pain.

Honey and steam

Honey has natural properties that act as a cough suppressant, and its thick consistency allows it to coat and soothe the raw throat lining. You can mix it with lemon in warm water for comforting relief. However, you must never give honey to children under one year old due to the risk of infant botulism.

Using steam or humidifiers is another excellent way to manage symptoms. Moist air prevents the throat from drying out, which is exactly why sore throats often feel much worse when you wake up in the morning. You can use a room humidifier, or stand in a steamy shower to breathe in the warm moisture. With caution not to sustain a scald, you can carefully lean over a bowl of hot water with a towel over your head. This is not suitable for children.

When are antibiotics needed?

Antibiotics are powerful medicines used to treat bacterial infections, but they are rarely the right choice for a typical sore throat.

Why antibiotics rarely work

Antibiotics are designed specifically to kill bacteria, not viruses. Because most sore throats are caused by viral infections, taking an antibiotic will not cure the illness or make you feel better any faster. The British National Formulary (BNF) notes that antibiotics offer only a modest benefit for acute sore throats and should be reserved for selected higher-risk cases. Furthermore, a Cochrane review concludes that routine use in otherwise healthy people is not justified. Overusing antibiotics contributes to global antibiotic resistance and can cause unnecessary side effects like upset stomachs and diarrhoea.

Diagnosing strep throat

If your symptoms strongly suggest a bacterial infection, a clinician will examine the back of your mouth, looking for severe redness, swollen tonsils, and white patches. In some instances, they might recommend a throat swab. This involves a quick, painless sweep of a cotton swab across the back of the throat to collect a sample. This test confirms if bacteria are actually present, ensuring antibiotics are only prescribed when absolutely necessary.

Finishing your antibiotic prescription

If a bacterial infection is suspected or confirmed, you may be prescribed a course of antibiotics. It is critical to take the full course exactly as directed by yourclinician, even if you start feeling better within a few days. Stopping early can lcause the infection to return or encourage the bacteria to become resistant to the medication in the future.

Care for children 

Treatment for sore throat often needs to be adapted for young children to ensure the chosen remedies are entirely safe.

Treating babies and children

You should always consult a doctor if a baby or very young child develops a severe sore throat, especially if they are refusing to drink. For older children, you can administer child-specific liquid paracetamol or ibuprofen to help reduce pain and fever. Always check the medication labels carefully to ensure you are giving the correct dose for their age and weight.

Remember to avoid giving honey to any child under one year of age. Additionally, hard boiled sweets or medicated lozenges should never be given to young children, as they represent a serious choking hazard. Instead, focus on offering small, frequent sips of cool water or ice lollies to help moisten their throat.

child with tongue stick

When to see a doctor

You should seek professional medical advice if your sore throat does not improve after a week, if you have a very high temperature, or if you have a weakened immune system.

Speaking to a pharmacist

A pharmacist should often be your first port of call for advice on over-the-counter treatments. You should speak to them if your sore throat is bothersome but you do not have any severe symptoms, or if you simply need advice on the best numbing lozenges, throat sprays, or pain relief. Pharmacists are highly trained to identify when symptoms might need a doctor's attention.

Booking a GP appointment

You should seek advice from a doctor if your symptoms are not resolving normally. Doctor Care Anywhere offers same-day virtual GP appointments where our clinicians can assess your symptoms via video and advise on the best course of action.

You should book a GP appointment if:

  • Your sore throat does not improve after a week.
  • You are generally worried about your symptoms.
  • You have a high temperature or you feel hot and shivery.
  • You have a weakened immune system due to a medical condition or treatment like chemotherapy.
  • You get sore throats very frequently.

When to get urgent help

Call 999 or go to A&Eif: You have difficulty breathing, you are drooling and unable to swallow your own saliva, or you are making a high-pitched sound when breathing (stridor).

Call 111 or see a GP urgently: You havedifficulty swallowing, or you have a muffled voice that sounds like you have a hot potato in your mouth, you cannot open your mouth fully, or you develop a stiff neck.

Frequently asked questions

The most frequently asked questions about hair loss cover topics such as stress, NHS treatments, and the effectiveness of medications. People experiencing hair loss often share similar concerns about prognosis and treatment timelines.

A sore throat is contagious for different lengths of time depending on the underlying cause. For standard viral infections, you are typically contagious for a day or two before symptoms start until they settle. If you have a confirmed bacterial infection, you are generally contagious until taking appropriate antibiotics for 24 to 48 hours. Ensure regular handwashing to prevent spreading the infection. 

 The difference between a sore throat and tonsillitis is the specific area affected by the inflammation. Tonsillitis is the inflammation of the tonsils, which are the two small glands at the back of your throat. A sore throat is the broader inflammation of the wider pharynx area. You can have a sore throat without tonsillitis, but tonsillitis always causes a sore throat. 

 Your sore throat is often worse in the morning because your throat becomes very dry overnight. Many people naturally breathe through their mouths while asleep, particularly if their nose is blocked by a cold. Sleeping in a room with warm, dry air can accelerates this moisture loss, significantly worsening the irritation when you wake up. 

 You can indeed get a sore throat from allergies like hay fever. An allergic reaction prompts your body to create excess mucus in the nasal passages, which drips down the back of your throat. This constant post-nasal drip physically irritates the delicate throat lining, causing a chronic, scratchy sensation rather than an acute, sharp pain. 

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