Vertigo is a condition that can make you feel like you have motion sickness, even when you are sitting still. People can experience dizziness, disorientation, and nausea. Vertigo can also make walking difficult and make it feel like the world is spinning. Vertigo is not a medical condition. Instead, it is a symptom of several different potential medical issues. Understanding vertigo can help you deal with episodes and get to the root of the causes.