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Dizziness

life science Maturity 11-13 Next article →

Dizziness is a word that describes many different feelings. It is not just one thing. It can mean a sense of being lost in space. It might mean vertigo, which is a spinning feeling. Some people feel lightheaded, which is called presyncope. Others feel disequilibrium, or a loss of balance. About 20% to 30% of people feel dizzy sometimes.

Your body uses many parts to keep you steady. Your inner ear helps you sense movement. Your eyes see where you are in a room. Your muscles and bones also help you stay upright. Your nervous system sends these signals to your brain. If these parts do not work together, you feel dizzy. This can happen because of a small problem or a big one.

Many things can cause these strange feelings. A sudden drop in blood pressure can cause dizziness. This happens when the brain does not get enough blood. Not having enough water, or dehydration, is another cause. Some medicines can also change how you feel. Even standing up too fast can make your head spin.

Doctors look at different groups to find the cause. About 40% of cases come from the inner ear. This is called peripheral vestibular dysfunction. About 25% of cases are presyncope or disequilibrium. Another 15% come from psychiatric disorders. About 10% of cases are non-specific dizziness. A small 10% come from the central nervous system.

Think about how you walk on a moving bus. Your body works hard to keep you from falling. If the bus turns, your inner ear and eyes react. Dizziness is like when those signals get mixed up. It can feel like the floor is tilting. It might even feel like you are floating.

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