Sore Throat (Pharyngitis): Causes, Symptoms, Treatment & Prevention

What Is a Sore Throat?

A sore throat, medically known as pharyngitis, is irritation, pain, or discomfort in the throat. It often becomes more noticeable while swallowing, speaking, or eating. Most cases are caused by viral infections, although bacterial infections, allergies, pollution, acid reflux, and other conditions can also trigger throat inflammation. 

Types of Sore Throat

Common Symptoms

People with a sore throat may experience:

• Pain or burning sensation in the throat
• Difficulty swallowing
• Scratchy or dry throat
• Hoarseness
• Swollen lymph nodes in the neck
• Fever
• Runny or blocked nose
• Cough
• Fatigue
• Red or swollen tonsils
• White patches on the throat or tonsils 

Causes of Sore Throat

Viral Infections

Viruses are the most common cause of sore throats and may include:

• Common cold
• Influenza (flu)
• COVID-19
• Other respiratory infections

Bacterial Infections

Some bacterial infections, particularly strep throat, can lead to severe throat pain and may require antibiotics. 

Allergies

Dust, pollen, mold, and pet dander can cause postnasal drip, irritating the throat.

Acid Reflux (GERD)

Stomach acid reaching the throat may cause persistent irritation and burning sensations. 

Environmental Irritants

• Smoking
• Air pollution
• Chemical fumes
• Excessively spicy foods

Mouth Breathing

Sleeping with an open mouth can dry out throat tissues and cause soreness.

Diagnosis

Doctors typically diagnose pharyngitis through:

• Medical history review
• Physical examination
• Throat swab test
• Rapid strep test when bacterial infection is suspected

Treatment Options

Home Remedies

• Drink warm fluids
• Gargle with warm salt water
• Use a humidifier
• Rest your voice
• Stay hydrated

Medications

• Pain relievers
• Antihistamines for allergies
• Antacids for reflux-related throat irritation
• Antibiotics only when a bacterial infection is confirmed 

Prevention Tips

• Wash hands frequently
• Avoid sharing utensils and drinks
• Stay updated on recommended vaccinations
• Avoid smoking and secondhand smoke
• Maintain good hydration 

When Should You See a Doctor?

Seek medical attention if you experience:

• Severe throat pain
• Difficulty breathing
• Difficulty swallowing
• Fever above 38°C (100.4°F)
• Blood in saliva
• Symptoms lasting more than one week
• Recurrent sore throat episodes 

FAQs

Can a sore throat go away on its own?

Yes, most viral sore throats improve within a few days without specific treatment. 

Is a sore throat always caused by an infection?

No. Allergies, acid reflux, smoking, pollution, and dry air can also cause throat irritation. 

How long does pharyngitis usually last?

Acute pharyngitis generally resolves within 3–10 days, while chronic pharyngitis may persist for weeks. 

Can acid reflux cause a sore throat?

Yes. Repeated exposure of the throat to stomach acid can lead to chronic throat irritation and discomfort.