Neuritis is inflammation of a nerve or the general inflammation of the peripheral nervous system. Inflammation, and frequently concomitant demyelination, cause impaired conduction of neural signals and leads to aberrant nerve function. Diagnosis. Besides a physical exam, which may include blood tests, diagnosis usually requires: A full medical history. Your doctor will review your medical history, including your symptoms, your lifestyle, exposure to toxins, drinking habits and a family history of nervous system (neurological) diseases. Most of the time, labyrinthitis and vestibular neuritis go away on their own. This normally takes several weeks. If the cause is a bacterial infection, your doctor will give you antibiotics. But most cases are caused by viral infections, which can't be cured with antibiotics.