Tragal Sign in ENT - Complete Guide

What is the Tragus?

Definition of the Tragal Sign

• Simultaneously, traction of the pinna (pulling the outer ear upward and backward) also produces pain in the same condition.
• Together, tragal pressure and pinna traction are the two classic physical examination maneuvers for diagnosing otitis externa.

Clinical Significance - What Does It Indicate?

Primary Association: Acute Otitis Externa (AOE) - "Swimmer's Ear"

• The EAC skin overlies thinly padded periosteum (bone or cartilage)
• In otitis externa, the skin is intensely inflamed, edematous, and erythematous
• Even minimal mechanical deformation of the canal causes severe pain

"Tragal sign - pressure on the tragus induces extreme pain" - this is listed as a cardinal sign of Acute Otitis Externa.

Tragal Sign: Key Differentiating Value

Harrison's notes: "AOM with tympanic membrane rupture can be associated with ear discharge and debris in the ear canal, but (unlike otitis externa) without sensitivity to movement of the auricle."

Full Clinical Picture of AOE (Context of Tragal Sign)

• Rapid onset of severe ear pain (< 48 hours)
• Usually unilateral
• Pruritus
• Otorrhea (often purulent)
• Aural fullness and hearing loss (if canal is significantly edematous)
• Fever is rare (if present, suggests periauricular cellulitis or necrotizing OE)

• Positive tragal sign (pathognomonic)
• Positive pinna traction sign
• Erythema and edema of EAC (may nearly occlude the canal)
• Purulent or serous debris in canal
• Normal TM mobility on pneumatic otoscopy (key differentiator from AOM)
• Preauricular or cervical lymphadenopathy

Grading of Otitis Externa (Severity Classification)

Pathogens Causing AOE

• Pseudomonas aeruginosa - most common (especially in swimmer's ear)
• Staphylococcus aureus - second most common
• Staphylococcus epidermidis, other gram-negative rods
• Bacterial infections account for ~90% of AOE cases
• Fungal (Aspergillus, Candida) - ~10%; typically causes pruritus and discharge without significant pain (so tragal sign may be less prominent in fungal OE)

Necrotizing (Malignant) Otitis Externa - Special Consideration

• High fever
• Granulation tissue or necrotic tissue in the EAC floor
• Patient is usually diabetic or immunocompromised (elderly, HIV, AIDS)
• Risk of osteomyelitis of temporal bone
• Can extend to involve cranial nerves (CN VII most commonly), causing facial palsy
• Requires urgent CT/MRI imaging and IV antipseudomonal antibiotics (e.g., ciprofloxacin)

Referred Ear Pain and Tragal Sign

• CN V - dental pathology, TMJ disorders
• CN VII - Ramsay Hunt syndrome (herpes zoster oticus), Bell's palsy
• CN IX - tonsillitis, pharyngitis
• CN X - GERD, myocardial infarction (rare)
• C2/C3 - cervical spine pathology

Diagnostic Criteria for AOE (AAO-HNS Guidelines)

1. Rapid onset (symptoms within 48 hours in the past 3 weeks)
2. Symptoms of ear canal inflammation: ear pain, itching, or fullness (±hearing loss or jaw pain)
3. Signs of ear canal inflammation: tenderness of tragus/pinna OR diffuse canal edema/erythema (±otorrhea, TM erythema, cellulitis, or lymphadenitis)

Treatment (Brief Overview)

• Aural toilet (debridement) is essential to allow drops to penetrate
• Otwick (ear wick/ribbon gauze) placed when canal edema prevents drop penetration; replaced every 3-5 days
• Keep ear dry (no swimming, use ear plugs for bathing)
• Oral antibiotics only if significant cellulitis beyond the canal

Summary

Tragal Sign - Reason for Positive & How to Elicit It

Anatomy First (The Basis of Everything)

Auricle anatomy - KJ Lee's Essential Otolaryngology

"The skin over the bony canal is tight and has no subcutaneous tissue except periosteum." - KJ Lee's Essential Otolaryngology

Nerve Supply of the EAC (Why It Hurts So Much)

Sensory innervation of the auricle - KJ Lee's Essential Otolaryngology

• V3 (auriculotemporal branch of mandibular nerve) - anterior EAC and tragus area
• CN VII (facial nerve, via posterior auricular branch) - posterior canal skin
• CN X (Arnold's nerve / auricular branch of vagus) - posterior/inferior canal floor (Arnold's reflex - cough when EAC touched)
• C2, C3 (via great auricular nerve and lesser occipital nerve) - auricle and periauricular skin

Why is the Tragal Sign POSITIVE in Otitis Externa?

Step 1 - Inflammation of the EAC skin

• Intensely erythematous and edematous
• Infiltrated with inflammatory cells and mediators (prostaglandins, bradykinin, histamine)
• Already hypersensitive due to lowered pain threshold from inflammation

Step 2 - The tragus acts as a direct compressor of the canal

• It physically deforms and compresses the anterior cartilaginous canal wall
• This compression is transmitted inward along the canal
• The inflamed, swollen canal skin - which has no cushion of subcutaneous tissue in the bony portion - is crushed between the pressing force and the rigid bony/cartilaginous canal walls

Step 3 - Stimulation of sensitized nerve endings

Why is it NEGATIVE in Otitis Media?

Steps to Elicit the Tragal Sign

Patient Positioning

• Patient seated comfortably, facing you
• Both ears should be tested (compare affected vs unaffected side)
• Explain the maneuver to the patient beforehand: "I am going to press gently in front of your ear - tell me if it hurts"

Step-by-Step Technique

• Use the pad of the finger, not the fingernail
• Press for 1-2 seconds
• Do not jab - apply steady, controlled pressure

• Positive: Patient winces, pulls away, or reports significant pain/tenderness
• Negative: No pain or only mild discomfort

• Grip the pinna (upper helix) between thumb and index finger
• Pull it upward and backward (posterosuperiorly)
• This also compresses/stretches the cartilaginous canal
• Positive = pain in otitis externa; Negative in otitis media

Summary Table