When you are spinning in the sky and unsteady on your feet, your most urgent wish is for your doctor to help you relieve your pain immediately. However, vertigo disease is very complicated, involving many diseases from many disciplines, and related to otolaryngology, neurology, general internal medicine, orthopedics, ophthalmology and other departments, so it can be difficult to make a clear diagnosis and treatment. Statistics show that 75% of vertigo is a lesion of the vestibular system, mainly caused by otologic diseases. Before visiting a doctor, you need to understand some basic concepts about vertigo. Vertigo is a sensation of spinning or swaying of yourself or an otherwise motionless object in the outside world, while the usual dizziness, lightheadedness and unsteadiness that occurs only when walking are often not true vertigo. The form of nystagmus often varies from disease to disease and can provide a lot of important information for a definite diagnosis, sometimes doctors need to observe the form of nystagmus to know what the disease is and how to treat it.