Why do you have giddiness when you put your head on pillow?

Giddiness when lying down can be caused by various factors, including changes in blood flow or pressure, inner ear issues, or even anxiety. When you lie down, your body shifts its position, which can affect balance and lead to sensations of dizziness. Additionally, if you're tired or dehydrated, it may exacerbate feelings of lightheadedness. If this symptom persists, it's advisable to consult a healthcare professional.