Pharyngitis
Inflammation of the throat that may cause soreness, irritation, or painful swallowing
Medically reviewed by a board-certified ENT specialist
- Author:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Medical reviewer:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Reviewed on:
- Last updated:
- Estimated reading time: 4 min
Overview
What is pharyngitis?
Pharyngitis is inflammation of the back of the throat (pharynx). It is most often caused by viral infections, but can also be related to bacterial infection, irritants, or reflux. Many cases improve with supportive care, while some require targeted treatment. Clinical evaluation helps identify causes that need specific management, such as streptococcal infection.
Symptoms
Common symptoms
Symptoms can vary depending on the cause and severity.
Sore or burning throat, especially when swallowing
Dry, scratchy, or irritated throat
Painful swallowing or mild swallowing difficulty
Temporary hoarseness or voice change
Fever, fatigue, or body aches
Tender, enlarged neck lymph nodes
Runny nose or cough, especially in viral illness
Possible causes
Why pharyngitis happens
Both infectious and non-infectious factors can inflame the throat.
Viral infection
The most common cause, including common cold viruses and influenza-related viruses.
Bacterial infection
Such as Group A streptococcus, which may cause severe throat pain and fever.
Environmental irritants
Smoke, air pollution, and chemical exposure may trigger throat inflammation.
Laryngopharyngeal reflux
Reflux of stomach contents into the throat can contribute to chronic throat irritation.
Heavy voice use
Frequent loud talking or prolonged voice strain may worsen irritation and soreness.
Allergy-related postnasal drip
Mucus draining from the nose into the throat can lead to persistent irritation.
When to seek care
When should I see an ENT specialist?
Seek medical evaluation if symptoms are persistent, severe, or concerning.
Throat pain lasting more than about one week
High fever or worsening symptoms
Marked swallowing difficulty, drooling, or trouble opening the mouth
Breathing difficulty, noisy breathing, or neck swelling
Rash with sore throat or concern for bacterial infection
Blood-stained sputum, prolonged hoarseness, or a neck lump
Frequent recurrent sore throat affecting daily life
Diagnosis
How is it diagnosed?
An ENT specialist reviews symptom history, duration, and risk factors, then examines the throat, tonsils, and neck lymph nodes. Depending on findings, additional tests such as rapid strep testing or throat culture may be considered to guide treatment.
Treatment
Treatment options
Treatment is tailored to the likely cause, symptom severity, and individual health factors.
Supportive symptom relief
Includes pain and fever control, hydration, and rest to help recovery.
Antibiotics when indicated
Used when bacterial infection is likely or confirmed, not routinely for viral pharyngitis.
Management of contributing conditions
Addressing allergy or reflux may improve recurrent or chronic throat symptoms.
Follow-up assessment
Follow-up may be advised if symptoms persist, recur frequently, or warning signs appear.
Self-care
What you can do at home
Safe home measures can reduce discomfort while the throat heals.
Rest and maintain regular fluid intake
Avoid smoking, second-hand smoke, and alcohol
Use warm saline gargles if appropriate
Reduce voice strain and avoid shouting
Use medicines as advised by your clinician or pharmacist
Prevention
Reducing risk
Not all sore throat episodes can be prevented, but risk can be lowered.
Wash hands regularly and avoid sharing personal items
Limit close contact with people who have respiratory infections
Use a mask in dusty or polluted environments when needed
Avoid smoking and second-hand smoke exposure
FAQ
Frequently asked questions
Common questions about pharyngitis and practical care.
Do all sore throats need antibiotics?
No. Many sore throats are viral and improve without antibiotics. Antibiotics are used when bacterial infection is suspected or confirmed.
When should I seek medical care for sore throat?
If symptoms are severe, worsen, or do not improve within about 5-7 days, medical assessment is recommended.
Can salt-water gargling help?
It may help reduce irritation and discomfort for some people, but it does not treat every cause of pharyngitis.
Is pharyngitis contagious?
When caused by viral or bacterial infection, it can spread through respiratory droplets and close contact.
Is hoarseness with sore throat serious?
Often temporary, but hoarseness lasting more than 2-3 weeks or associated warning signs should be evaluated.
References
Related guidelines and patient resources
The sources below are recognized international guidelines and patient-education resources for general learning. They are not individualized medical advice.
Patient information on throat, voice, and swallowing
AAO-HNS / ENThealth
View source (AAO-HNS / ENThealth)Patient education and clinical guidance in otolaryngology
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
View source (American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS))Public ENT health information
ENThealth (AAO-HNS Foundation)
View source (ENThealth (AAO-HNS Foundation))
Educational information
Medical Disclaimer
This information is intended for educational purposes only and does not replace diagnosis or treatment by a qualified physician. If you have concerning symptoms, please consult an ENT specialist.
Related links
Learn more
Related clinic pages to help you explore conditions, services, and procedures.
Persistent sore throat or painful swallowing?
A focused ENT assessment can help identify the cause and guide evidence-based care.