The most common cause of dizziness when lying down is benign paroxysmal positional vertigo (BPPV). BPPV occurs when tiny calcium crystals in the inner ear become dislodged and move into the ear canals that detect head motion. This causes false signals to the brain that the head is moving, which creates a spinning sensation or vertigo, especially when changing head position while lying down or rolling over in bed. The dizziness episodes are usually brief, lasting about 10 to 20 seconds, but can be intense and disorienting. Other causes of dizziness when lying down can include head injuries, inner ear infections or disorders like Ménière’s disease, dehydration, low blood sugar, anxiety, medications, or other medical conditions affecting balance. In summary, dizziness when lying down is often related to inner ear problems like BPPV, but if symptoms persist or worsen, seeing a healthcare professional is advisable for diagnosis and treatment.
