Symptoms and Associated Features

A detailed history of symptoms and associated features should be reported.

Symptom onset includes:

• Date of onset [1]
• Rapidity of progression [1]
• History of preceding viral illness or trauma [1]
• Rash [3]
• Other evidence of infection

Associated features may include:

• Ear pain [3]
• Sensory changes on affected side of face
• Reduced tears [3]
• Overflow of tears
• Hyperacusis [3]
• Altered taste sensation [3]