Is a sore throat contagious?

Viruses commonly cause sore throat and may spread through droplets, hands, saliva, and close contact. Bacterial infections such as [Strep Throat](/conditions/strep-throat/) can also spread. [Tonsillitis](/conditions/tonsillitis/) describes inflamed tonsils and may be caused by either viruses or bacteria, so the label alone does not establish contagiousness.

A scratchy throat with sneezing or congestion may occur with a [Common Cold](/conditions/common-cold/), [Influenza](/conditions/influenza/), or [COVID-19](/conditions/covid-19/). Throat irritation without an infection can occur with [Acid Reflux](/conditions/acid-reflux/) or [Allergic Rhinitis](/conditions/allergic-rhinitis/). [Glandular Fever](/conditions/glandular-fever/) can spread through saliva and may cause prolonged tiredness.

While the cause is unclear, reduce close contact when fever or new respiratory symptoms are present. Wash hands, cover coughs and sneezes, avoid sharing cups and utensils, and improve ventilation. Rest, drink fluids, and use simple soothing measures that are suitable for you. Testing or examination may be useful when symptoms are severe, persistent, or linked to a known exposure.

Seek medical advice for a sore throat that is severe, keeps returning, or makes drinking difficult. Urgent help is needed for breathing trouble, inability to swallow saliva, dehydration, confusion, or rapidly worsening swelling. A clinician can assess accompanying fever, rash, swollen glands, cough, or marked fatigue and decide whether testing is appropriate.

Ask what cause is most consistent with your symptoms, how long to avoid close contact, whether testing is needed, and which symptom-relief options fit your health history. Tell the clinician about recent travel, household illness, new medicines, reflux, or allergy symptoms.