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Common Causes of Sore Throat & How to Get Relief at Home

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Written by
Carina Ryder, MS, BSN.
Certified Nurse Midwife, Takoma Park Gynecology
Last updated February 18, 2021

Sore throat questionnaire

Use our free symptom checker to find out what's causing your sore throat.

Is fatigue causing your sore throat? Can an ear infection cause a sore throat? Learn about the causes of your sore throat symptoms and treatment options.

Sore throat questionnaire

Use our free symptom checker to find out what's causing your sore throat.

Sore throat symptom checker

Sore throat symptoms

Your throat is itchy, scratchy and painful. You wish you didn't have to swallow. It feels as if someone is scraping your throat with coarse sandpaper. Maybe you're coughing. Maybe you're not. Either way, sore throat equals misery.

Common accompanying symptoms of sore throat

In addition to sore throat symptoms, you might also have:

  • Fever
  • Hoarseness
  • Loss of your voice
  • A reddened throat
  • Pus on your tonsils
  • Other cold and flu symptoms
  • Difficulty eating and drinking
  • White patches on the back of your throat

It does not matter that it is not likely to last more than a few days it will feel like forever. Your sore throat symptoms might be due to an infection, acid reflux, or something else it doesn't matter you just want relief. To understand what might bring you relief, you'll need to know what is causing the sore throat. Let's see what the culprit might be...

Causes of a sore throat

Viral infections

The common cold and the flu are both viral infections, and yes, they can both make your throat sore. Antibiotics cannot cure viral infections. You'll have to wait it out (unless you have the flu and early enough in the course, drugs can shorten the severity and duration of flu symptoms).

Bacterial infections

The most common bacterial offender is Group A Streptococcus (aka "strep throat"). Strep throat can be treated and cured with antibiotics. Strep throat, if untreated, can cause complications such as rheumatic fever, which can then lead to rheumatic heart disease (which can damage heart valves). Strep throat can also cause scarlet fever.

Gastroesophageal reflux disease (GERD)

Repeated exposure to regurgitated acids of reflux can irritate the tissue lining your throat. On rare occasions, this might be treated with antibiotics.

Other conditions that can cause a sore throat

Other causes of a sore throat include:

  • Smoking
  • Seasonal and environmental allergies
  • Dry air, especially in the winter
  • Recent trauma due to surgery, a choking incident: Or accidentally swallowing something like a bone

This list does not constitute medical advice and may not accurately represent what you have.

Viral throat infection

A viral throat infection is an infection of the throat, or pharynx, that is caused by viruses. Viruses are different from bacteria such as Streptococcus pyogenes (which causes "strep throat"). Viral infections are the most common cause of sore throats in children and adu..

Common cold

The common cold is a viral infection of the upper respiratory tract, which includes the nose, mouth, sinuses, throat, and larynx. There are over 200 viruses that can cause upper respiratory infections, and usually the exact virus behind a cold is never known.

The common cold is, of course, very common..

Strep throat requiring throat swab

Strep throat, or "strep," is a sore throat specifically caused by the bacteria Streptococcus pyogenes, also called group A streptococcus.

The illness spreads when an infected person coughs or sneezes and then someone else inhales the airborne bacteria, or touches a surface where it has landed and then touches their own face.

Children are most susceptible but anyone can be infected.

Symptoms include sudden throat pain, fever, headache, rash, body aches, and red, swollen tonsils. These symptoms can be caused by other illnesses, so a sample is taken by gently rubbing a sterile cotton-tipped swab over the back of the throat.

Testing will identify the organism responsible so that treatment with the appropriate antibiotic can begin. Be sure to finish all of the medication as directed, even after feeling better.

Untreated strep throat can lead to ear infections, kidney disease, scarlet fever, and rheumatic fever. These are serious illnesses. If strep throat is suspected, the person should see a doctor as soon as possible.

Rarity: Common

Top Symptoms: fatigue, nausea, sore throat, fever, rash

Symptoms that always occur with strep throat requiring throat swab: sore throat

Symptoms that never occur with strep throat requiring throat swab: general weakness

Urgency: Primary care doctor

Sore throat questionnaire

Use our free symptom checker to find out what's causing your sore throat.

Sore throat symptom checker

Acid reflux disease (gerd)

GERD (gastroesophageal reflux disease) in infants refers to the passage of stomach contents into the throat causing troublesome symptoms, such as feeding intolerance, inadequate oral intake of calories and/or poor weight gain. Vomiting or visible regurgitation ..

Mononucleosis infection

Infectious mononucleosis, also called "mono" or "kissing disease," can be debilitating for a while but is usually not dangerous in itself.

Several viruses cause mononucleosis. It spreads easily through saliva and other body fluids. Sharing a drinking glass or a spoon, or kissing someone who has the virus – even they show no symptoms – will transmit the disease. It can also be sexually transmitted.

Due to lifestyle, teenagers and young adults seem to be the most susceptible.

Symptoms include tiredness, sore throat, fever, rash, body aches, swelling in the neck and armpits, and sometimes swollen liver and spleen. The symptoms alone are usually enough for the doctor to make a diagnosis.

Because mononucleosis is caused by a virus, antibiotics will not help. Treatment consists of bed rest, fluids, and good nutrition. The patient should still be under a doctor's care due to the risk of secondary infections or damage to the heart, liver, and spleen.

Handwashing, cleanliness, not sharing dishes or drinking glasses, and not having unprotected sex are the best ways to prevent mononucleosis.

Rarity: Common

Top Symptoms: fatigue, headache, loss of appetite, abdominal pain (stomach ache), cough

Urgency: Primary care doctor


Influenza, or "flu," is a contagious respiratory illness caused by viruses. It is spread through the air by coughing, sneezing, or even talking.

Anyone can get the flu, but those who are very young, over 65, and/or have pre-existing medical conditions are most at risk for complications.

Symptoms include fever, chills, cough, sore throat, body aches, and extreme fatigue. The symptoms may appear very suddenly.

Flu can bring on secondary bacterial infections in the lungs or ears. Dehydration is a great concern because the patient rarely wants to eat or drink.

Diagnosis is usually made by symptoms. There are tests that use a swab taken from the nose or throat, but they are not always accurate or necessary.

Treatment consists mainly of good supportive care, which means providing the patient with rest, fluids, and pain-relieving medication such as ibuprofen. Do not give aspirin to children.

Antibiotics cannot help with the flu, since antibiotics only work against bacteria. There are anti-viral medications that a doctor may prescribe.

The best prevention is an annual flu shot.

Rarity: Common

Top Symptoms: fatigue, headache, loss of appetite, cough, muscle aches

Symptoms that never occur with influenza: headache resulting from a head injury

Urgency: Phone call or in-person visit

Canker sore in the throat

Canker sores are also called aphthous stomatitis, aphthous ulcers, or mouth ulcers. They are not the same as "cold sores."

The exact cause of canker sores is not known. Viruses, allergies, and auto-immune response may all play a role, as well as stress, smoking, and poor diet.

Symptoms include small, flat, painful gray or white sores on the inner lining of the cheeks and on the gums and roof of the mouth. They may also appear on the tonsils in the back of the throat. The sores usually last for three to four days.

Anyone with canker sores should see a medical provider. The sores often recur and can interfere with quality of life.

Diagnosis is made through physical examination.

There is no actual cure for canker sores, though the symptoms can be treated to ease the discomfort. Managing stress, stopping smoking, and improving diet can help to prevent a recurrence. The sores usually heal on their own within 10 to 14 days.

Rarity: Uncommon

Top Symptoms: sore throat, pain with swallowing, sore/ulcer in the throat, severe pain when swallowing

Symptoms that always occur with canker sore in the throat: sore throat, pain with swallowing

Symptoms that never occur with canker sore in the throat: fever, cough

Urgency: Self-treatment

Strep throat needing antibiotics

Strep throat is a bacterial throat infection that can make your throat feel sore and scratchy. Only a small portion of sore throats are the result of strep throat.

Rarity: Common

Top Symptoms: fever, fatigue, nausea, sore throat, muscle aches

Symptoms that always occur with strep throat needing antibiotics: fever, pain with swallowing, sore throat

Symptoms that never occur with strep throat needing antibiotics: general weakness

Urgency: Primary care doctor

Sore throat treatments and relief

When a sore throat is an emergency

Seek medical care if you have a sore throat and:

At-home treatments for a sore throat

Beyond using an antibiotic to treat a bacterial infection or waiting for a virus to pass, there is relief.

  • Gargling with salt water
  • Drinking slippery elm tea or eating slippery elm lozenges: FYI, too much slippery elm can cause diarrhea
  • Sucking on throat lozenges that have a mild anesthetic: Such as Cepacol lozenges
  • Humidifying the air
  • Staying indoors days when the pollution index is high: Also, to cool off while inside, use the air conditioner instead of opening the windows (the air conditioner will filter some of the pollution out of the air)
  • Drink lemon tea with honey
  • Take pain medication: Such as acetaminophen (Tylenol) or ibuprofen (Advil, Motrin)
  • Suck on ice cubes

Sore throat questionnaire

Use our free symptom checker to find out what's causing your sore throat.

Sore throat symptom checker

FAQs about sore throat

How do you know if you have Strep Throat?

Strep throat can be tested using a throat swab. Strep throat or streptococcal pharyngitis is often accompanied by red eyes, a persistent cough, fever, inflamed mucous membranes in the nose, and nausea. You may also find white pus along the tonsils on either side of the throat.

What causes scratchy throat?

A "scratchy throat" is caused by inflammation of the throat. Specifically, the tonsils within the throat. The tonsils are masses of lymphoid tissue (similar to lymph nodes) for white blood cells (immune cells) in the body. When you become ill, your immune system is activated. The lymph nodes of the immune system swell as white blood cells from all over the body converge to fight a local infection. In the case of a scratchy throat, an upper respiratory tract infection is present and may cause pain or tightness because of the swelling of tonsils and surrounding tissue.

What does a sore throat look like?

A sore throat may look different depending on the cause, but most commonly, it is accompanied by an angry, red throat and tonsils on either side of the throat as well as swelling on either side or both sides. There are multiple patterns of appearance associated with a sore throat. For example, some illnesses cause a white, chunk pus-like material along either side of the throat, others cause "cobblestoning" or a series of red bumps along the back of the throat like brick cobblestones. There is no single appearance of a sore throat.

What causes pus pockets in the throat?

Pus is caused by your body fighting an infection, and when you have a sore throat caused by an infection, pus pockets can collect in the throat. Pus pockets on either side of the throat can be a sign of tonsillitis, an infection of the tonsils. They are present particularly in infections of streptococcal bacteria, and are a sign of bacterial infection, as opposed to viral infections like the flu and the common cold.

What is tonsillitis?

Tonsillitis is a swelling of the tonsils usually caused by a bacterial infectione. It can involve a buildup of pus on one or both tonsils on either side of the throat. The tonsils are essentially branching "police stations" in the body in which white blood cells or "cops" of the body congregate. They may become swollen during an infection and may even become infected themselves. When they become infected with a bacteria, this is called tonsillitis. Pus is often present because pus is a collection of dead white blood cells and dead bacterial pathogens.

Questions your doctor may ask about sore throat

  • Any fever today or during the last week?
  • Do you have a cough?
  • Have you been feeling more tired than usual, lethargic or fatigued despite sleeping a normal amount?
  • Have there been changes in your voice?

Self-diagnose with our free Buoy Assistant if you answer yes on any of these questions.

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Dr. Rothschild has been a faculty member at Brigham and Women’s Hospital where he is an Associate Professor of Medicine at Harvard Medical School. He currently practices as a hospitalist at Newton Wellesley Hospital. In 1978, Dr. Rothschild received his MD at the Medical College of Wisconsin and trained in internal medicine followed by a fellowship in critical care medicine. He also received an MP...
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