Do not try to decide “viral or bacterial” from symptoms alone
Labyrinthitis describes inflammation affecting balance and hearing structures in the inner ear. Severe vertigo without hearing loss may have another diagnosis, including vestibular neuritis, and sudden vestibular symptoms can also have neurological causes. Fever, ear pain or discharge, recent infection and hearing change are important clues, but they cannot safely identify the cause without examination.
When urgent assessment is needed
Sudden hearing loss in one or both ears needs urgent same-day medical or ENT assessment. High fever, severe ear pain or swelling, ear discharge with worsening illness, stiff neck, altered consciousness, facial weakness, severe new headache, double vision, limb weakness, speech difficulty or inability to walk safely also requires urgent or emergency assessment.
How clinicians investigate it
Assessment may include an ear and neurological examination and a hearing test. Further blood tests, imaging, cultures or hospital assessment are selected only when the clinical findings indicate them. No single symptom, scan or online comparison table can confirm viral or bacterial labyrinthitis.
Treatment and recovery
Treatment depends on the confirmed or suspected cause, severity, hearing findings and other medical conditions. Bacterial infection involving the inner ear can be serious and may require hospital-led treatment. Other acute vestibular illnesses are managed differently. This page does not recommend antibiotics, antivirals, steroids or a recovery timetable. Improvement varies, and persistent imbalance may require follow-up and rehabilitation after urgent causes have been addressed.
References
- NHS Inform — Labyrinthitis
- NICE — Hearing-loss referral guidance
- NICE — Suspected neurological conditions
Read next — from Dr. Porwal's vertigo library

