What could be causing persistent unilateral throat pain on the right side for 9 days without other symptoms, such as difficulty swallowing, congestion, cough, or fever?

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Unilateral Throat Pain for 9 Days Without Systemic Symptoms

This presentation warrants urgent clinical evaluation to rule out serious causes, as persistent unilateral throat pain without typical infectious symptoms is atypical for common pharyngitis and raises concern for peritonsillar abscess, deep space infection, or rarely, malignancy.

Key Clinical Concern

The absence of fever, difficulty swallowing, cough, congestion, and the unilateral, persistent nature of your symptoms for 9 days makes this presentation inconsistent with typical viral or streptococcal pharyngitis 1. Most acute pharyngitis cases, whether viral or bacterial, present with bilateral symptoms and resolve within 3-7 days even without treatment 2.

Differential Diagnosis to Consider

High-Priority Concerns Requiring Evaluation:

  • Peritonsillar abscess or deep space infection: These can present with unilateral throat pain and may not initially cause fever or dysphagia, though they typically progress to more severe symptoms 1, 3

  • Glossopharyngeal neuralgia or referred pain: Unilateral, constant pain without infectious signs may suggest nerve-related pathology 4

  • Early neoplastic process: While uncommon, persistent unilateral throat pain lasting beyond typical infection timelines (>14 days approaching) should raise suspicion for tonsillar or pharyngeal malignancy, particularly in adults 4

  • Atypical infection: Organisms like Mycoplasma pneumoniae, Chlamydia pneumoniae, or even Neisseria gonorrhoeae can cause pharyngitis with atypical presentations 3, 5

Why This Doesn't Fit Common Pharyngitis

Viral pharyngitis typically resolves within 3-4 days for constitutional symptoms and less than one week for throat soreness 2. Your 9-day duration exceeds this timeline 1.

Streptococcal pharyngitis usually presents with fever, bilateral tonsillopharyngeal findings, and responds within days even without antibiotics 1. The Centor criteria (fever, tonsillar exudates, tender anterior cervical lymphadenopathy, absence of cough) help identify streptococcal infection, but your presentation lacks these typical features 1.

Recommended Immediate Actions

Clinical Examination Needed:

  • Direct visualization of the oropharynx to assess for asymmetry, peritonsillar bulging, trismus, or masses 1, 3

  • Palpation for unilateral cervical lymphadenopathy or masses 1, 4

  • Assessment for "hot potato voice," drooling, or subtle dysphagia that may indicate abscess formation 5

Diagnostic Testing:

  • If examination suggests infection: Rapid antigen detection test (RADT) or throat culture, though your presentation makes typical GAS pharyngitis unlikely 1

  • If examination shows asymmetry or mass effect: Imaging (CT with contrast) to evaluate for abscess or mass 1, 3

  • Consider complete blood count if systemic illness is suspected (though rare presentations of leukemia can manifest as throat pain) 6

Common Pitfalls to Avoid

  • Assuming all sore throats are infectious: Non-infectious causes including thyroiditis, neoplasm, and neurologic pain must be considered with atypical presentations 3, 4

  • Delaying evaluation of unilateral symptoms: Unilateral presentation lasting >7-10 days requires direct examination to exclude serious pathology 1, 4

  • Empiric antibiotics without diagnosis: Guidelines explicitly recommend against antibiotic use without confirmed bacterial infection, and your presentation doesn't meet criteria for empiric treatment 1

Symptomatic Management While Awaiting Evaluation

  • Ibuprofen or acetaminophen for pain relief 1

  • Avoid empiric antibiotics until diagnosis is established 1, 7

Seek evaluation within 24-48 hours given the persistent unilateral nature and 9-day duration, as this presentation requires direct examination to exclude complications that could affect morbidity 1, 3, 4.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Guideline

Time Course of Strep Throat Without Antibiotics

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025

Research

The patient with sore throat.

The Medical clinics of North America, 2010

Research

The sore throat. Pharyngitis and epiglottitis.

Infectious disease clinics of North America, 1988

Research

[A case of acute myelocytic leukemia suffered throat pain as initial symptom].

Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology head and neck surgery, 2014

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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