Dizziness is one of the most common reasons people see a clinician, and it is a broad word that can mean several different sensations. Understanding which kind you have is the first step.
People use the word dizziness for different feelings. It may mean lightheadedness, as if you might faint; it may mean a spinning sensation, called vertigo, where you or the room feels like it is moving; or it may mean unsteadiness and a loss of balance. Describing the exact sensation helps narrow down the cause.
Dizziness and vertigo have many possible causes. Some involve the inner ear, which helps control balance. Others relate to blood pressure, dehydration, low blood sugar, certain medicines, anxiety, or problems with circulation. Because the list is broad, the pattern of your symptoms and what brings them on matters a great deal.
Get medical help promptly if dizziness comes on suddenly and severely, or with symptoms such as chest pain, a severe headache, trouble speaking, weakness or numbness, fainting, or a fever with a stiff neck. These can point to problems that need urgent attention. If dizziness keeps returning or interferes with daily life, it is worth discussing with a clinician even without emergency signs.
Mednex asks a short set of structured questions about what you are feeling and gives a cited, plain-language read on what could be involved and what to consider next.
Start a symptom checkContent last reviewed 9 July 2026. Reference ranges vary by laboratory; always read your results against the range printed on your own report.
This page describes a common symptom in general terms using public information from the U.S. National Library of Medicine. It is educational and is not a diagnosis or medical advice, and it cannot tell you what is causing your symptom. If your symptom is severe, sudden, or does not go away, or if you are worried, contact a healthcare professional.