Why do I feel dizzy when I look up?

Understanding Dizziness When Looking Up

Experiencing dizziness, vertigo, unsteadiness, and nausea when you move your head could be due to benign paroxysmal positional vertigo (BPPV). This condition is often triggered by movements such as rolling over in bed, getting out of bed, or simply tilting your head back to look up. Fortunately, BPPV is a disorder that can typically be treated quite easily.