Why You Feel Dizzy When You Stand Up, Your Heart Races and No One Has Any Answers

You may have noticed that when you stand up, your body doesn’t quite respond the way you expect it to. Instead of adjusting smoothly, you feel lightheaded, your heart begins to race, and there can be a sense of instability that makes you pause or sit back down.

For some people, this happens occasionally. For others, it becomes a consistent pattern that starts to impact daily life.

These symptoms are often dismissed as dehydration, stress, or anxiety, particularly when standard testing comes back normal. However, when dizziness on standing, heart palpitations, and fatigue occur together, it can point toward an underlying issue with how the body is regulating circulation and the nervous system.

One condition where this pattern is commonly seen is Postural Orthostatic Tachycardia Syndrome (POTS).