Vestibular neuritis is inflammation of the inner ear and vestibular nerve that causes severe dizziness, vertigo, and balance issues. It is mainly caused by viral infections like herpes, influenza, or autoimmune diseases. Symptoms include severe dizziness, vertigo, nausea, balance issues, and sometimes hearing loss or vision problems. Treatment options include chiropractic treatments, acupuncture, and medications like Antivert. The condition varies in duration but can last from 3 weeks to several months.