Why Does My Throat Hurt?
The honest verdict
This is usually not an allergy
A sore throat is rarely caused by an allergy. Most cases are due to viral infections (common cold, flu, COVID-19), dry air, or irritants like smoke. Allergies can contribute indirectly through post-nasal drip, which causes throat irritation and coughing, but the classic painful, scratchy sore throat is far more likely to be infectious. Strep throat (bacterial) is less common but needs antibiotic treatment. If a sore throat occurs with sneezing, itchy eyes, or clear nasal drainage, seasonal allergies may be a factor, but the soreness itself is usually from the drip, not a direct allergic response.
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 sore throat 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
Difficulty breathing, drooling, or muffled voice (possible epiglottitis or severe swelling) — call 911.
Call 911 or go to the ER now
- Emergency
Severe throat pain with inability to swallow saliva or open the mouth fully — go to the ER (possible peritonsillar abscess).
Call 911 or go to the ER now
- Urgent
Sore throat with a red rash that feels like sandpaper (possible scarlet fever from strep) — seek urgent care.
Get seen today — urgent care or same-day visit
- See a doctor
Fever over 101°F with swollen, tender lymph nodes and white patches on tonsils — see a clinician within 24-48 hours (possible strep throat needing antibiotics).
Book a routine visit with a clinician
- See a doctor
Sore throat lasting more than a week without improvement, or recurring frequently — see a clinician to rule out chronic causes (reflux, tonsillitis, or rarely other conditions).
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 (about 80-90%) are caused by viruses, not bacteria, and do not need antibiotics.
Strep throat accounts for only about 20-30% of sore throats in children and 5-15% in adults.
Post-nasal drip from allergies is a common cause of chronic or recurrent sore throat, especially in people with untreated allergic rhinitis.
What's causing it
The same symptom can come from very different places. Here are the usual suspects for Throat (pharynx) — the muscular tube behind the mouth and nasal cavity that connects to the esophagus and windpipe, tagged by mechanism and how common each one is — so you can see where an allergy actually fits.
Viral infection (common cold, flu, COVID-19)
Most sore throats are caused by viruses that also bring runny nose, cough, congestion, and sometimes fever. The throat pain is usually worst in the first 2-3 days and resolves on its own with rest and hydration.
Dry air or mouth breathing
Dry indoor air (especially in winter or with air conditioning) or sleeping with the mouth open can dry out the throat lining, causing a scratchy, raw sensation. Using a humidifier or drinking water often resolves it quickly.
Post-nasal drip from allergies or sinusitis
Allergic rhinitis or sinus congestion can cause mucus to drip down the back of the throat, irritating it and causing a sore, tickly feeling. This is not a direct allergic reaction in the throat itself but a secondary irritation. Antihistamines or nasal sprays may help.
Strep throat (bacterial infection)
Caused by Group A Streptococcus bacteria, strep throat brings sudden, severe throat pain, fever over 101°F, swollen lymph nodes, and white patches on the tonsils. It does not usually cause cough or runny nose. A rapid strep test or culture is needed for diagnosis; antibiotics are required.
Irritants (smoke, pollution, shouting)
Smoke (tobacco, wildfire), chemical fumes, or yelling/singing loudly can inflame the throat lining. The pain usually fades within a day after removing the irritant. Resting the voice and avoiding smoke helps.
Gastroesophageal reflux (GERD)
Stomach acid backing up into the throat (especially at night) can cause a chronic sore throat, hoarseness, a lump sensation, or bitter taste. It is often worse after eating or lying down. Antacids or acid-reducing medications can help.
Is this an allergy? Usually, no
It's a common assumption, so it's worth being clear about — and pointing you toward what's more likely going on.
A sore throat is usually not an allergy. Allergies can contribute indirectly through post-nasal drip — when allergens trigger nasal congestion and mucus production, the mucus drips down the back of the throat and causes irritation, tickling, or a raw sensation. This is not a direct allergic reaction in the throat itself. If your sore throat comes with sneezing, itchy eyes, and clear nasal drainage, seasonal allergies may be the underlying cause of the drip. Treating the allergies (with antihistamines, nasal sprays, or avoiding triggers) often resolves the throat irritation. However, a classic painful, scratchy sore throat with fever or cough is far more likely to be viral or bacterial.
Because an allergy is unlikely to be the driver, the most useful next step is a clinician who can look at the actual cause — not an allergy test.
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
Warm salt water gargle
Mix 1/2 teaspoon of salt in 8 ounces of warm water and gargle for 30 seconds, then spit. This can soothe the throat and reduce swelling. Repeat every few hours as needed.
- 2
Stay hydrated
Sip warm liquids (tea with honey, broth) or cold liquids (ice water, popsicles) throughout the day. Avoid acidic or spicy drinks that can further irritate the throat.
- 3
Use a humidifier or steam
Dry air worsens throat pain. Run a cool-mist humidifier in your room, or breathe steam from a bowl of hot water (carefully) for 10-15 minutes to moisten the throat.
- 4
Over-the-counter pain relief
Acetaminophen or ibuprofen can reduce throat pain and fever. Throat lozenges or sprays with numbing ingredients (benzocaine, phenol) may provide temporary relief. Follow label directions.
- 5
Rest your voice
Avoid talking, whispering (which strains the voice more), shouting, or singing until the pain subsides. Whispering can actually irritate the vocal cords further.
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 you have a sore throat with a fever over 101°F, swollen lymph nodes, white patches on the tonsils, or a rash — these may indicate strep throat requiring antibiotics. Seek emergency care for difficulty breathing, drooling, inability to swallow saliva, or a muffled voice. If a sore throat lasts more than a week without improvement, or if it recurs frequently, see a clinician to evaluate for chronic causes like reflux, tonsillitis, or other conditions.
❓Frequently Asked Questions
It is very rare for allergies to cause a sore throat alone. Allergies typically produce a cluster of symptoms: sneezing, itchy or watery eyes, runny or stuffy nose, and sometimes post-nasal drip that irritates the throat. If you have only a sore throat without any nasal or eye symptoms, a viral infection or dry air is a much more likely cause.
Allergies usually come with sneezing, itchy eyes, and clear nasal drainage, and they last as long as you are exposed to the allergen (weeks or months). Colds often bring a sore throat first, followed by cough, congestion, and sometimes fever, and they resolve within 7-10 days. Colds are contagious; allergies are not.
See a doctor if you have a fever over 101°F, swollen lymph nodes, white patches on your tonsils, or a rash — these suggest strep throat, which needs antibiotics. Also see a doctor if the sore throat lasts more than a week, if you have difficulty swallowing, or if it keeps coming back.
Yes — post-nasal drip from allergies or sinusitis can irritate the back of the throat, causing a tickly, scratchy, or raw sensation. This is not a direct allergic reaction in the throat itself, but the mucus draining down can inflame the tissue. Treating the underlying allergy often resolves the throat discomfort.
Yes — sore throat is a common symptom of COVID-19, along with fever, cough, fatigue, body aches, and loss of taste or smell. If you have a sore throat and have been exposed to someone with COVID-19 or have other symptoms, consider taking a test. Most sore throats from COVID-19 resolve with rest and hydration.
Medically reviewed by
Dr. Chet TharpeMD
Last reviewed July 2026
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Read moreThe best next step is a real clinician
This symptom is usually not driven by an allergy, so an allergy test won't give you the answer. A primary care doctor or the right specialist can examine what's actually going on and guide you from there.
Curex focuses on at-home allergy testing and immunotherapy, which isn't the right fit for this symptom — and never a substitute for medical care.
- 1Centers for Disease Control and Prevention — Sore Throat Basics
- 2Mayo Clinic — Sore throat: Causes and when to see a doctor
- 3Cleveland Clinic — Sore Throat: Causes, Treatment & Prevention
- 4American Academy of Allergy, Asthma & Immunology — Allergic Rhinitis (Hay Fever)
- 5MedlinePlus — Sore Throat (National Library of Medicine)
This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. It cannot tell you what is causing your sore throat 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 focuses on at-home allergy testing and immunotherapy, which is not the appropriate care for this symptom and never a substitute for a clinician.