Sore Throat: Clinical Meaning

Influenza (Flu)

Influenza is a highly contagious respiratory viral illness caused by influenza A or B viruses. It spreads through respiratory droplets and causes sudden fever, severe body aches, fatigue, cough, and headache. Annual vaccination is recommended for prevention.

Common Cold

The common cold is a viral upper respiratory infection, most often caused by rhinoviruses. Symptoms include runny nose, sneezing, sore throat, cough, and mild fever. It is usually self-limiting and resolves within 7–10 days.

COVID-19

COVID-19 is an infectious respiratory disease caused by the SARS-CoV-2 virus. Symptoms range from mild (fever, cough, fatigue) to severe (pneumonia, respiratory failure). Long COVID affects some patients with persistent symptoms lasting months.

Infectious Mononucleosis (Mono)

Infectious mononucleosis, caused by Epstein-Barr virus, presents with severe fatigue, sore throat, swollen lymph nodes, and splenomegaly. It primarily affects adolescents and young adults; strenuous activity must be avoided due to spleen rupture risk.

Streptococcal Pharyngitis (Strep Throat)

Strep throat is a bacterial infection of the throat caused by Group A Streptococcus, causing sore throat, fever, and swollen tonsils. Antibiotic treatment prevents rare but serious complications including rheumatic fever and kidney disease.

Chronic Sinusitis

Chronic sinusitis is sinus inflammation lasting more than 12 weeks, causing nasal congestion, facial pressure, postnasal drip, and reduced sense of smell. It is subdivided into forms with and without nasal polyps; treatment includes nasal steroids, saline irrigation, and sometimes surgery.

Tonsillitis

Tonsillitis is inflammation of the palatine tonsils, causing sore throat, difficulty swallowing, fever, and swollen glands. Recurrent bacterial tonsillitis may require tonsillectomy; Group A Streptococcus is the most important bacterial cause.

Chronic Fatigue Syndrome (ME/CFS)

Myalgic encephalomyelitis/chronic fatigue syndrome is a complex, debilitating condition causing profound fatigue not improved by rest, post-exertional malaise, cognitive difficulties, and sleep disturbances lasting over 6 months. No curative treatment exists; management focuses on symptom relief and pacing.

Viral Pharyngitis

Viral pharyngitis is throat inflammation caused by a viral infection, most commonly rhinovirus or adenovirus. It is the most frequent cause of sore throat and resolves without antibiotics.

Acute Laryngitis

Acute laryngitis is sudden inflammation of the larynx typically caused by viral upper respiratory infections. The hallmark is hoarseness or voice loss, usually lasting less than 3 weeks.