Symptoms — Characteristics of Cogan's syndrome which are considered "classic" symptoms by the Network and medical field :

• Rapid onset of hearing loss
  • One ear or both
  • instantly
  • overnight
  • during the day.
• With or without eye inflammation
  • One eye or both
• Vertigo, Dizziness, nausea, can't stand up, need something to hold onto.
• No balance or severe gait, walking as if drunk.
• Tinnitus, constant bells, ringing, variations of hums, like a generator.