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Understanding Sore Throats: Causes, Symptoms, and Relief

What Causes a Sore Throat?

A sore throat (pharyngitis) is a common symptom with several possible triggers. Identifying the cause helps guide appropriate treatment.

Viral Infections (Most Common)

Approximately 90% of sore throats are viral. Common culprits include:

  • Common cold viruses (rhinoviruses, coronaviruses)
  • Influenza (flu) viruses
  • Epstein-Barr virus (mononucleosis)
  • COVID-19

Viral sore throats typically resolve on their own within 5–7 days. Antibiotics are ineffective against viruses.

Bacterial Infections

About 10% of cases are bacterial, most notably Streptococcus pyogenes (group A strep), which causes strep throat. Strep throat is more common in children aged 5–15. Key features include sudden severe throat pain, fever over 101°F (38.3°C), swollen tonsils with white patches, and tender neck lymph nodes—often without cough or runny nose. A rapid strep test or throat culture confirms diagnosis; antibiotics (penicillin or amoxicillin) are prescribed to prevent complications like rheumatic fever.

Environmental Irritants & Allergies

  • Smoke, pollution, dry air: Irritate the throat lining directly.
  • Allergens (pollen, pet dander, mold): Trigger postnasal drip that inflames the throat.
  • Indoor heating/cooling: Low humidity dries mucous membranes.

Other Medical Conditions

  • Mononucleosis: Viral illness with severe sore throat, fatigue, fever, swollen lymph nodes, and sometimes spleen enlargement.
  • Tonsillitis: Inflammation of the tonsils (viral or bacterial).
  • GERD: Stomach acid reflux can cause chronic throat irritation.
  • HIV infection: Acute seroconversion may include sore throat.

When to See a Doctor

  • Sore throat lasting >1 week
  • Difficulty breathing or swallowing
  • Fever >101°F (38.3°C) lasting >2 days
  • Rash, joint pain, or blood in saliva
  • Recurrent sore throats

Home Relief Measures

  • Stay hydrated (water, herbal tea, broth)
  • Gargle with warm salt water (½ tsp salt in 8 oz water)
  • Use lozenges or honey (not for children <1 year)
  • Run a cool-mist humidifier
  • Rest your voice
  • Over-the-counter pain relievers (acetaminophen, ibuprofen)

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