What are the red flags for acute pharyngitis?

Question

Dominique Trauer · Accepted Answer

- **Red flags** warranting emergency referral include: unwell/toxic appearance, respiratory distress, stridor, trismus, drooling, "hot potato" (muffled) voice, and torticollis - These features suggest serious complications or alternative diagnoses such as **peritonsillar abscess (quinsy), retropharyngeal/parapharyngeal abscess, epiglottitis, or deep neck space infection** - Additional concerning findings include neck stiffness/fullness, inability to swallow, asymmetric pharyngeal swelling, and a grey-white pharyngotonsillar membrane ## Red Flags for Acute Pharyngitis The following features should prompt **immediate ED referral** or urgent medical consultation: ### Airway and Respiratory - **Stridor** or noisy breathing - Respiratory distress, dyspnoea, or tachypnoea - Tripod positioning ### Oropharyngeal Signs - **Trismus** (limited mouth opening) - **"Hot potato" voice** (muffled voice associated with pharyngeal/peritonsillar pathology) - **Drooling** /…

Condition	Key Distinguishing Features
Peritonsillar abscess (quinsy)	Unilateral sore throat, trismus, uvula deviation, "hot potato" voice, peritonsillar swelling
Retropharyngeal abscess	Fever, neck stiffness, torticollis, limitation of neck extension, posterior pharyngeal wall bulge
Parapharyngeal abscess	Trismus, swelling below mandibular angle, medial pharyngeal wall bulging, systemic toxicity
Epiglottitis	Severe sore throat, anterior neck tenderness, drooling, stridor, rapid progression; pain out of proportion to examination findings
Deep neck space infection / Ludwig's angina	Floor of mouth swelling, neck swelling, airway compromise

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What are the red flags for acute pharyngitis?

Red Flags for Acute Pharyngitis

Airway and Respiratory

Oropharyngeal Signs

Systemic

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