Persistent postural-perceptual dizziness (PPPD) is a chronic functional disorder characterized by non-spinning vertigo and unsteadiness lasting for at least 3 months. The diagnosis is made based on diagnostic criteria including symptoms exacerbated by upright posture, motion, and moving visual stimuli. PPPD can be triggered by acute or chronic vestibular disorders, neurological illnesses, or psychological distress. Treatment involves education, vestibular exercises, medication like SSRIs or SNRIs, and cognitive behavioral therapy.