Why Do I Have Sores in My Throat?
The honest verdict
It can be an allergy — but not always
Throat sores are sometimes linked to allergies, but infection and irritation are far more common causes. Viral pharyngitis and strep throat account for most cases. Allergic causes — such as oral allergy syndrome (raw or scratchy throat after eating certain raw fruits or vegetables) or angioedema from a food or drug allergy — can produce throat soreness or rawness. If throat sores are accompanied by swelling, hives, or difficulty breathing, an allergic reaction should be considered and treated urgently.
This is a general research summary, not a diagnosis. It can't tell you what's causing your symptom — a clinician can.
Check this first
When throat sores is an emergency
Most of the time this can be handled calmly. But a few signs mean you shouldn't wait. Match what you're seeing to the right level of care below.
If any emergency sign below is present, call 911 or go to the ER now.
- Emergency
Throat swelling with difficulty breathing, stridor (a high-pitched sound when breathing), or the feeling that your airway is closing — call 911 immediately. This can be anaphylaxis or severe angioedema.
Call 911 or go to the ER now
- Emergency
Throat swelling along with swelling of the lips, tongue, or face, hives, or lightheadedness after eating, a drug, or an insect sting — call 911 (possible anaphylaxis).
Call 911 or go to the ER now
- Emergency
Severe sore throat with high fever, muffled voice, drooling, and difficulty opening the mouth or swallowing — seek emergency care (possible peritonsillar abscess or epiglottitis).
Call 911 or go to the ER now
- Urgent
Rapidly worsening sore throat with a high fever that does not improve, or a sore throat with tender lymph nodes, stiff neck, or difficulty swallowing fluids — seek urgent care to rule out strep or abscess.
Get seen today — urgent care or same-day visit
- See a doctor
Throat sores that persist for more than two weeks without a clear cause, or that are accompanied by unexplained weight loss, hoarseness, or a lump in the neck — see a clinician for evaluation.
Book a routine visit with a clinician
When in doubt, err toward getting seen. These tiers are a general guide, not a substitute for a clinician's judgment about your specific situation.
Key facts
Most sore throats in adults are caused by viruses and resolve without antibiotics within 7 to 10 days.
Oral allergy syndrome affects a significant portion of people with seasonal pollen allergies and can cause throat itching or rawness after eating raw fruits, vegetables, or nuts.
Throat swelling from angioedema or anaphylaxis is a life-threatening emergency — epinephrine (EpiPen) is the first-line treatment and 911 should be called without delay.
What's causing it
The same symptom can come from very different places. Here are the usual suspects for Throat and pharynx — the back of the mouth and upper airway connecting the nose and mouth to the esophagus, tagged by mechanism and how common each one is — so you can see where an allergy actually fits.
Viral pharyngitis
The most common cause of a sore, raw throat. Cold viruses (rhinovirus, adenovirus, coronavirus) inflame the throat lining, causing soreness that can look red and irritated. It usually resolves on its own within a week with rest and fluids.
Strep throat (Group A Streptococcus)
A bacterial infection causing sudden, severe throat pain with red, swollen tonsils, white or yellow patches, and fever. Unlike viral sore throats, strep requires antibiotic treatment — a clinician can confirm with a rapid strep test.
Acid reflux (GERD or laryngopharyngeal reflux)
Stomach acid traveling up into the throat causes chronic irritation, rawness, and a sensation of a lump or soreness, especially in the morning. It may occur without classic heartburn. Dietary changes and elevation of the head during sleep can help.
Oral allergy syndrome
People with pollen allergies (especially birch or grass) may experience throat itchiness, rawness, or tingling within minutes of eating certain raw fruits, vegetables, or nuts (e.g., apples, celery, almonds). Cooking the food typically eliminates the reaction. It is usually mild and self-limiting.
Allergic angioedema
A deeper swelling of the throat tissue triggered by food, drug, or insect-sting allergies. It can cause throat tightness, soreness, or difficulty swallowing. Severe throat angioedema is a medical emergency requiring immediate care.
Mouth ulcers or canker sores extending to the throat
Aphthous ulcers (canker sores) can sometimes appear in the back of the throat, causing a sharp, localized pain. Their exact cause is not fully understood but may involve stress, nutritional deficiencies, or minor tissue injury. They are not contagious.
Where allergy actually fits in
When a symptom like this is allergy-driven, it usually points to a specific trigger. Knowing which one is the difference between guessing and actually fixing it.
Allergies can sometimes cause throat soreness or rawness, though they are a less common cause than infection or irritation. Oral allergy syndrome (also called pollen-food allergy syndrome) is the most frequent allergy-related cause: people who are sensitized to birch, grass, or ragweed pollen may experience an itchy, scratchy, or sore sensation in the throat within minutes of eating certain raw foods. Symptoms are usually mild and brief. More serious is allergic angioedema — a swelling of deeper throat tissue triggered by a food, medication, or insect-sting allergy — which can be dangerous and requires urgent care. If an allergen is consistently triggering throat symptoms, at-home allergy testing can help identify the specific trigger.
Relief you can try at home
If your symptom is mild and you have no red-flag signs, these gentle steps often help. They soothe — they don't replace figuring out the cause.
- 1
Gargle with warm salt water
Dissolving half a teaspoon of salt in eight ounces of warm water and gargling for 30 seconds can help reduce irritation and keep the throat moist. Repeat several times per day as needed.
- 2
Stay hydrated and rest
Drinking warm fluids (water, herbal tea, broth) soothes throat tissue and helps maintain hydration, which supports recovery from viral infections. Rest gives the immune system time to work.
- 3
Use throat lozenges or sprays
Over-the-counter throat lozenges or numbing sprays containing benzocaine or menthol can temporarily ease soreness. Follow label directions and avoid giving benzocaine products to young children.
- 4
Humidify the air
Dry air irritates throat tissue. Running a cool-mist humidifier in your room — especially at night — can reduce rawness and help you sleep more comfortably.
- 5
Avoid known irritants
If oral allergy syndrome is suspected, try cooking or peeling the trigger fruits and vegetables before eating. Avoid cigarette smoke, alcohol, and very acidic foods, which can worsen throat irritation.
Stop any step that makes things worse. If the symptom isn't easing within a few days, check in with a clinician.
When to see a doctor
See a clinician if your throat sores are accompanied by a high fever, white patches on the tonsils, swollen lymph nodes, or difficulty swallowing — these can indicate strep throat, which needs antibiotic treatment. Also see a clinician if soreness lasts more than two weeks, recurs frequently, or is accompanied by unexplained weight loss, hoarseness, or a lump in the neck. Seek emergency care immediately if you have throat swelling that makes it hard to breathe or swallow, or if throat soreness occurs alongside hives, facial swelling, or dizziness after a potential allergen exposure.
❓Frequently Asked Questions
Allergies can cause throat rawness, itchiness, or tightness — most commonly through oral allergy syndrome (triggered by raw fruits, vegetables, or nuts in people with pollen allergies) or allergic angioedema (deep swelling from a food or drug allergy). Classic throat sores with visible ulcers are more often caused by viral or bacterial infection. If throat symptoms appear alongside hives, facial swelling, or trouble breathing, treat as an allergic emergency and seek care immediately.
Strep throat tends to come on suddenly with a severe sore throat, fever, swollen tonsils with white or yellow patches, and painful lymph nodes in the neck — but usually without a runny nose or cough. Viral sore throats often accompany cold symptoms like a runny nose, congestion, or mild cough. Only a rapid strep test or throat culture can confirm strep; see a clinician if you suspect it, since strep requires antibiotic treatment.
Oral allergy syndrome (pollen-food allergy syndrome) causes itching, tingling, or a raw sensation in the lips, mouth, and throat within minutes of eating certain raw fruits, vegetables, or nuts. It is linked to cross-reactivity between pollen allergens and food proteins. The throat sensation is typically mild and brief; it is not usually a 'sore' in the ulcer sense, but it can feel raw or scratchy. Cooking the trigger food usually eliminates the reaction.
Seek emergency care immediately if your sore throat is accompanied by throat swelling that makes it hard to breathe or swallow, a high-pitched sound when breathing (stridor), hives or facial swelling after a potential allergen, or drooling with a muffled voice and high fever. These can signal anaphylaxis, severe angioedema, peritonsillar abscess, or epiglottitis — all of which require urgent treatment.
Yes — acid reflux, including laryngopharyngeal reflux (silent reflux), can cause chronic throat irritation, rawness, and a burning or sore sensation, often without classic heartburn. Stomach acid that reaches the throat inflames the delicate mucous membranes. It is a common and often overlooked cause of persistent throat soreness. A clinician can evaluate and recommend dietary changes or medication if reflux is suspected.
Medically reviewed by
Dr. Chet TharpeMD
Last reviewed July 2026
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If your throat sores keeps coming back and an allergen might be the cause, testing tells you what you actually react to. Curex offers at-home allergy testing and immunotherapy so you can treat the trigger, not just soothe the symptom.
- At-home allergy test kit — no clinic visit
- Reviewed by board-certified allergists
- Find the trigger instead of guessing
- 1Mayo Clinic — Sore Throat: Symptoms and Causes
- 2Cleveland Clinic — Sore Throat (Pharyngitis): Causes and Treatment
- 3American Academy of Allergy, Asthma & Immunology — Oral Allergy Syndrome
- 4MedlinePlus — Sore Throat (National Library of Medicine)
- 5Cleveland Clinic — Anaphylaxis: Symptoms, Causes and Treatment
This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. It cannot tell you what is causing your throat sores or whether it is an allergy. If you have any emergency sign — trouble breathing, fast-spreading swelling, sudden weakness or confusion, or severe pain — call 911 or go to the nearest emergency room. For anything that is new, worsening, or persistent, see a licensed healthcare provider. Curex offers at-home allergy testing and immunotherapy for confirmed environmental allergies; it does not diagnose this symptom or provide emergency care.