Sore throat is a high-volume urgent care complaint with a broad differential: most cases are self-limited viral pharyngitis, but a small subset represent group A streptococcal (GAS) pharyngitis, influenza, COVID-19, infectious mononucleosis, sexually transmitted infection, or a potentially life-threatening upper-airway or deep-neck infection. A reliable sore throat urgent care evaluation begins with airway assessment and illness severity—not with a strep test.

Clinical overview

Acute pharyngitis is usually viral. GAS is the most common bacterial cause, accounting for an estimated 20% to 30% of pharyngitis episodes in children and 5% to 15% in adults. Clinical findings alone are insufficient to distinguish GAS from viral pharyngitis when viral features are absent; targeted microbiologic testing is therefore central to antimicrobial stewardship.^[1]

The urgent care clinician must separate patients appropriate for outpatient symptomatic care from those with dehydration, impending airway compromise, sepsis, peritonsillar abscess, retropharyngeal/parapharyngeal infection, epiglottitis, Ludwig angina, or other conditions requiring emergency department (ED) transfer and specialty support.

Etiology and clinical significance

Common viral causes include rhinovirus, adenovirus, seasonal coronaviruses, influenza, SARS-CoV-2, enteroviruses, and Epstein-Barr virus (EBV). GAS typically causes abrupt sore throat, odynophagia, fever, tender anterior cervical adenopathy, palatal petechiae, and tonsillar erythema or exudate. Cough, rhinorrhea, hoarseness, conjunctivitis, and oral ulcers favor a viral syndrome.^[1]

Although rare in routine outpatient practice, clinicians should maintain situational awareness for diphtheria in an undervaccinated patient or a patient with relevant travel or exposure history. A pharyngeal pseudomembrane that may extend into the larynx or trachea is a classic respiratory diphtheria finding and may threaten the airway.^[2]

Focused history

• Timeline and severity: abrupt versus gradual onset; days of illness; progression; unilateral versus bilateral pain; fever; ability to swallow liquids and medications; urine output; and pain severity.
• Airway symptoms: drooling, muffled voice, trismus, stridor, dyspnea, orthopnea, inability to handle secretions, neck swelling, neck stiffness, or pain with neck movement.
• Associated symptoms: cough, coryza, hoarseness, conjunctivitis, oral ulcers, rash, headache, abdominal pain, nausea, vomiting, fatigue, posterior cervical lymphadenopathy, hepatosplenomegaly symptoms, or lower-respiratory symptoms.
• Exposure and epidemiology: household GAS contact; school/daycare or congregate-setting exposure; respiratory-virus activity; known influenza or COVID-19 exposure; travel; vaccination status; and foodborne or outbreak context.
• Sexual history when relevant: oral sexual exposure, known sexually transmitted infection (STI) contact, genital symptoms, and HIV exposure risk. Pharyngeal gonorrhea is often asymptomatic but may cause pharyngeal symptoms and should be considered when exposure history supports testing.^[3]
• Host factors: age; pregnancy; immune suppression; diabetes; cancer therapy; transplant history; HIV; recurrent tonsillitis; recent antibiotics; medication allergies and reaction phenotype; renal or hepatic disease; anticoagulants; and alcohol use.

Focused examination

Begin with appearance and vital signs. Document temperature, heart rate, blood pressure, respiratory rate, oxygen saturation, hydration status, mental status, and whether the patient can speak in full sentences and manage oral secretions.

• Inspect the lips, oral cavity, tongue, floor of mouth, palate, tonsils, posterior pharynx, and buccal mucosa. Note erythema, exudate, ulceration, petechiae, vesicles, thrush, asymmetry, swelling, uvular deviation, bleeding, or pseudomembrane.
• Assess voice quality, trismus, tongue elevation, submandibular induration, drooling, and cervical range of motion.
• Palpate anterior and posterior cervical nodes and evaluate for focal neck mass, fluctuance, or tenderness.
• Examine for scarlatiniform rash, hand/foot lesions, conjunctivitis, hepatosplenomegaly when clinically appropriate, pulmonary findings, and signs of systemic illness.

A careful oropharyngeal examination must not delay emergency transfer in a patient with stridor, respiratory distress, drooling, tripod positioning, severe agitation, altered mental status, or other evidence of a threatened airway. Avoid forceful tongue-depressor examination of a patient with suspected epiglottitis or marked airway compromise.

Differential diagnosis

• Viral pharyngitis: usually associated with cough, rhinorrhea, hoarseness, oral ulcers, conjunctivitis, or diffuse upper-respiratory symptoms.
• GAS pharyngitis/scarlet fever: abrupt sore throat, fever, tender anterior nodes, palatal petechiae, exudative tonsillitis, and sometimes a sandpaper-like rash.
• EBV infectious mononucleosis: marked fatigue, posterior cervical adenopathy, diffuse adenopathy, tonsillar exudate, and possible splenomegaly or transaminitis.
• Influenza and COVID-19: pharyngitis may accompany fever, myalgia, cough, headache, malaise, or lower-respiratory symptoms.
• Peritonsillar cellulitis or abscess: unilateral severe pain, “hot potato” voice, uvular displacement, trismus, drooling, and referred otalgia.
• Retropharyngeal or parapharyngeal infection: toxic appearance, neck pain or stiffness, muffled voice, limited neck extension, dysphagia, or respiratory symptoms; young children may present nonspecifically.
• Odontogenic infection/Ludwig angina: dental source, floor-of-mouth swelling, tongue elevation, submandibular induration, or inability to manage secretions.
• STI-associated pharyngitis: gonorrhea, acute HIV, and, less commonly, syphilis or herpes simplex virus, depending on syndrome and exposure.
• Noninfectious causes: allergic/postnasal irritation, reflux, smoke or chemical irritation, medication-related mucositis, aphthous disease, malignancy, and foreign body or trauma.

Must-not-miss diagnoses and red flags

Arrange immediate ED transfer, preferably by emergency medical services when airway risk is present, for:

• Stridor, respiratory distress, cyanosis, hypoxia, tripod positioning, inability to speak comfortably, or rapidly progressive symptoms.
• Drooling, inability to swallow liquids or secretions, clinically important dehydration, or inability to take oral medication.
• Trismus, muffled voice, uvular deviation, substantial unilateral tonsillar/soft-palate swelling, or concern for peritonsillar abscess.
• Neck swelling, floor-of-mouth elevation, submandibular induration, torticollis, significant neck stiffness, or pain with neck extension.
• Toxic appearance, persistent tachycardia/hypotension, altered mental status, concern for sepsis, or immunocompromise with severe illness.
• Suspected epiglottitis, deep-neck-space infection, Lemierre syndrome, or diphtheria.

Peritonsillar abscess may progress to airway obstruction, aspiration, extension into deep neck spaces, mediastinitis, or vascular complications. Airway assessment and stabilization take priority over imaging or attempted drainage.^[4,5]

Diagnostic approach

When GAS testing is useful

Do not routinely test for GAS when the presentation has clear viral features such as cough, rhinorrhea, hoarseness, oral ulcers, or conjunctivitis. In patients without clear viral features, use a validated clinical prediction tool, such as a Centor or McIsaac-based approach, to estimate pretest probability and guide testing rather than relying on clinical appearance alone. The 2025 IDSA guideline update supports use of clinical scoring systems to identify patients at sufficiently low probability of GAS who may not require testing.^[1,6]

GAS pharyngitis is uncommon in children younger than 3 years; routine testing is generally not indicated unless there are special epidemiologic considerations, such as a symptomatic child with a close household GAS contact.^[1]

Rapid antigen detection tests, molecular assays, and culture

• Rapid antigen detection test (RADT): A positive RADT is highly specific and confirms GAS. Sensitivity varies compared with culture.
• Throat culture: Remains the reference standard. For symptomatic children age 3 years and older, obtain a backup throat culture after a negative RADT and maintain a reliable process to notify the family and start treatment if culture is positive.
• Adults and other ages: Backup culture after a negative RADT is not routinely indicated because acute rheumatic fever is very rare in these groups.
• Molecular/NAAT testing: Follow the assay’s instructions for use and local laboratory policy. High-sensitivity molecular tests may reduce the need for reflex culture, but workflows vary by platform and local protocol.

Collect a high-quality throat specimen by vigorously swabbing both tonsillar pillars and the posterior pharynx while avoiding the tongue and cheeks when possible. Inadequate sampling is a common cause of false-negative results.

Testing beyond GAS

Test for SARS-CoV-2 and influenza when results will alter treatment, infection-control decisions, or disposition—particularly in patients at elevated risk for severe disease. When available, multiplex molecular assays can detect SARS-CoV-2 and influenza together. A negative SARS-CoV-2 antigen test does not reliably exclude infection in a symptomatic patient; repeat antigen testing or nucleic acid testing should follow current regulatory and local guidance.^[7,8]

For suspected EBV, heterophile antibody testing may be used in an appropriate clinical syndrome, but it has important false-positive and false-negative limitations, especially in children. CDC does not recommend the Monospot test for general use. Consider EBV-specific serology when the presentation is atypical or when diagnostic clarification will change management. CBC and hepatic tests may be useful when illness is significant, prolonged, or complicated, but should not be routine for every sore throat.^[9]

Obtain pharyngeal gonorrhea nucleic acid amplification testing when exposure history indicates. If pharyngeal gonorrhea is diagnosed, CDC recommends a test of cure 7 to 14 days after treatment because eradication is more difficult at the pharyngeal site.^[3]

Imaging is not routine for uncomplicated pharyngitis. In a stable patient with concern for deep-neck infection or diagnostic uncertainty, ED-based contrast-enhanced CT and/or specialist-directed ultrasound may be appropriate. Do not delay airway management or transfer to obtain outpatient imaging.

Management

Uncomplicated viral pharyngitis

Provide supportive care: oral hydration, warm or cold liquids according to patient preference, salt-water gargles for patients able to gargle safely, rest, and analgesic/antipyretic therapy. Explain that antibiotics do not treat viral pharyngitis and create risks of adverse drug reactions, Clostridioides difficile infection, and antimicrobial resistance.

Analgesic and antipyretic options

• Acetaminophen: For adults, a typical dose is 650 to 1,000 mg orally every 6 hours as needed. Do not exceed 4,000 mg/day from all sources in adults and adolescents age 12 years and older; use a lower individualized ceiling in patients with hepatic impairment, substantial alcohol use, frailty, malnutrition, or clinician-directed restrictions. Pediatric dosing is weight-based; verify the product concentration, dosing interval, and maximum daily dose before use. Counsel patients to check combination cold/flu products for acetaminophen/APAP.^[10]
• Ibuprofen: For adults without contraindications, a typical analgesic dose is 200 to 400 mg orally every 6 to 8 hours as needed; prescription regimens and maximum daily doses vary. Pediatric dosing is weight-based and should include a maximum dose. Avoid or use cautiously in chronic kidney disease, dehydration, active gastrointestinal bleeding or ulcer disease, anticoagulant use, uncontrolled hypertension, heart failure, and NSAID hypersensitivity. Avoid routine NSAID use in pregnancy at 20 weeks’ gestation or later unless specifically directed; avoid after approximately 30 weeks because of fetal risk.^[11]

Topical anesthetic lozenges or sprays may offer short-term relief in selected patients, but product-specific age restrictions, aspiration risk, allergy history, and toxicity precautions matter. Avoid recommending oral benzocaine products to very young children because of safety concerns and follow current product labeling.

Corticosteroids

A single corticosteroid dose may modestly improve the likelihood of symptom resolution at 48 hours, but guideline support is weak and shared decision-making is appropriate. It should not substitute for airway evaluation, drainage, or antibiotics when those are indicated. A commonly studied adult regimen is dexamethasone 10 mg orally or intramuscularly once; pediatric regimens are weight-based, often dexamethasone 0.6 mg/kg once to a maximum of 10 mg. Avoid routine use in suspected infectious mononucleosis, immunocompromised patients without a clear indication, recurrent sore throat, poorly controlled diabetes, or when masking progression of a deep infection is a concern. Verify local protocols and current dosing before use.^[12]

Confirmed GAS pharyngitis

Treat patients with a positive RADT or throat culture. Penicillin and amoxicillin remain preferred because clinical GAS isolates have not been reported resistant to penicillin or cephalosporins. Macrolide and clindamycin resistance occurs and varies geographically and over time; use local antibiograms and public-health information when selecting these agents.^[1]

• Penicillin V: Adults and adolescents: 500 mg orally twice daily for 10 days, or 250 mg orally four times daily for 10 days. Children: 250 mg orally two or three times daily for 10 days.
• Amoxicillin: 50 mg/kg orally once daily, maximum 1,000 mg/day, for 10 days; alternatively, 25 mg/kg orally twice daily, maximum 500 mg per dose, for 10 days.
• Benzathine penicillin G: Single intramuscular dose when adherence to a 10-day oral regimen is doubtful: 600,000 units for weight below 27 kg; 1.2 million units for weight 27 kg or greater.

For a non-immediate penicillin allergy, cephalexin 20 mg/kg/dose orally twice daily (maximum 500 mg/dose) for 10 days is an option. Do not use cephalexin or cefadroxil in patients with immediate-type penicillin hypersensitivity. Alternative regimens include clindamycin 7 mg/kg/dose orally three times daily (maximum 300 mg/dose) for 10 days, azithromycin 12 mg/kg once (maximum 500 mg), then 6 mg/kg once daily (maximum 250 mg) for 4 days, or clarithromycin 7.5 mg/kg/dose twice daily (maximum 250 mg/dose) for 10 days.^[1]

Before prescribing, document the allergy phenotype rather than using “penicillin allergy” as an undifferentiated label. Review renal function for renally eliminated antibiotics and adjust when indicated; assess hepatic disease and interaction risks for macrolides. Macrolides may prolong QT interval and have clinically important CYP-mediated interactions. Clindamycin has a meaningful risk of antibiotic-associated diarrhea and C. difficile infection. In pregnancy, penicillin-class agents are commonly used when indicated, but antibiotic selection should be individualized using current labeling, allergy history, gestational age, and obstetric considerations.

For confirmed GAS, advise patients to remain home from school, work, or daycare until afebrile and at least 12 to 24 hours after starting appropriate antibiotics.^[1]

Special populations

• Pediatrics: Children are more vulnerable to dehydration and may have nonspecific presentations of serious deep-neck infection. Use weight in kilograms, verify liquid concentrations, document maximum doses, and arrange backup culture after a negative RADT in symptomatic children age 3 years and older.
• Pregnancy: Evaluate respiratory-virus treatment eligibility promptly because time-sensitive antivirals may be relevant. Avoid casual NSAID recommendations; medication choice should account for gestational age and obstetric comorbidity.
• Older adults: Do not dismiss severe symptoms because fever may be absent. Assess medication interactions, renal reserve, anticoagulation, aspiration risk, and atypical presentations of sepsis.
• Immunocompromised patients: Lower the threshold for ED evaluation, expanded testing, imaging, and specialist consultation when symptoms are severe, progressive, persistent, or associated with oral lesions or systemic findings.

Disposition, follow-up, and return precautions

Outpatient management is reasonable when the patient has a stable airway, can tolerate oral fluids and medication, has reassuring vital signs and examination, and has reliable follow-up. Arrange follow-up for persistent symptoms, uncertain diagnosis, pending throat culture, positive STI testing, suspected EBV with activity counseling needs, or any patient at increased risk of complications.

Advise immediate emergency evaluation for breathing difficulty, noisy breathing, drooling, inability to swallow liquids, worsening unilateral swelling, trismus, muffled voice, neck swelling or stiffness, confusion, fainting, persistent vomiting, reduced urine output, or clinical deterioration. Patients with suspected EBV should avoid contact sports and activities with abdominal trauma risk until clinically recovered and cleared as appropriate because splenic enlargement can occur.^[13]

Documentation considerations

• Document airway assessment, secretion handling, hydration status, vital signs, and absence or presence of red flags.
• Record clinical prediction score elements when used, GAS test type/result, specimen collection plan, reflex culture plan, and communication method for pending results.
• Describe asymmetry, uvular position, trismus, voice quality, neck examination, and rationale for ED transfer or outpatient care.
• For antibiotics, document indication, allergy phenotype, renal/hepatic considerations, counseling, shared decision-making when relevant, and local resistance considerations for macrolide or clindamycin use.

Clinical takeaways

• Airway and hydration assessment come before strep testing.
• Clear viral symptoms usually eliminate the need for GAS testing.
• Positive RADT confirms GAS; negative RADT in symptomatic children age 3 years and older requires backup throat culture.
• Do not treat a negative GAS test or presumed viral pharyngitis with antibiotics.
• Unilateral swelling, trismus, muffled voice, drooling, neck symptoms, or respiratory compromise should trigger urgent escalation rather than routine outpatient treatment.
• Verify all medication doses, formulations, contraindications, interactions, renal/hepatic adjustments, pregnancy considerations, test instructions for use, and current national/local guidance independently before clinical application.

References

1. Centers for Disease Control and Prevention. Clinical guidance for group A streptococcal pharyngitis [Internet]. Atlanta (GA): CDC; 2025 Nov 18 [cited 2026 Aug 18].
2. Centers for Disease Control and Prevention. Clinical features of diphtheria [Internet]. Atlanta (GA): CDC; 2025 May 12 [cited 2026 Aug 18].
3. Centers for Disease Control and Prevention. Gonococcal infections among adolescents and adults. In: Sexually transmitted infections treatment guidelines, 2021 [Internet]. Atlanta (GA): CDC; 2021 [cited 2026 Aug 18].
4. Akhavan M. Ear, nose, throat: beyond pharyngitis: retropharyngeal abscess, peritonsillar abscess, epiglottitis, bacterial tracheitis, and postoperative tonsillectomy. Emerg Med Clin North Am. 2021;39(3):541-556. doi:10.1016/j.emc.2021.04.012.
5. Krishnaprasadh D, Hohman MH, McDowell RH. Peritonsillar abscess. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan 31 [cited 2026 Aug 18].
6. Barshak MB, Linder JA, Watson ME Jr, Wessels MR, Carter DM, Cohen AL, et al. 2025 clinical practice guideline update by the Infectious Diseases Society of America on group A streptococcal pharyngitis: risk assessment using clinical scoring systems in children and adults. Clin Infect Dis. 2025. doi:10.1093/cid/ciaf310.
7. Centers for Disease Control and Prevention. Clinical guidance for hospitalized and non-hospitalized patients when SARS-CoV-2, RSV, and influenza viruses are co-circulating [Internet]. Atlanta (GA): CDC; 2026 May 4 [cited 2026 Aug 18].
8. Centers for Disease Control and Prevention. Testing for COVID-19 [Internet]. Atlanta (GA): CDC; 2025 Mar 10 [cited 2026 Aug 18].
9. Centers for Disease Control and Prevention. Laboratory testing for Epstein-Barr virus (EBV) [Internet]. Atlanta (GA): CDC; 2024 Apr 10 [cited 2026 Aug 18].
10. US Food and Drug Administration. Acetaminophen [Internet]. Silver Spring (MD): FDA; 2026 [cited 2026 Aug 18].
11. US Food and Drug Administration. FDA recommends avoiding use of NSAIDs in pregnancy at 20 weeks or later because they can result in low amniotic fluid [Internet]. Silver Spring (MD): FDA; 2020 Oct 15 [updated 2022 Sep 1; cited 2026 Aug 18].
12. Aertgeerts B, Agoritsas T, Siemieniuk RAC, Burgers J, Ekkering GE, Merglen A, et al. Corticosteroids for sore throat: a clinical practice guideline. BMJ. 2017;358:j4090. doi:10.1136/bmj.j4090.
13. Centers for Disease Control and Prevention. About infectious mononucleosis (mono) [Internet]. Atlanta (GA): CDC; 2024 May 9 [cited 2026 Aug 18].

Educational disclaimer: This article is intended for clinician education and does not replace individualized assessment, local protocols, specialist consultation, medication labeling, or current guideline review. Medication dosing and treatment decisions must be independently verified before clinical use.