Persistent dizziness with normal test results? It’s real, it could be PPPD... and recovery is possible. As vestibular physical therapists, we work with patients and clients every day who are experiencing these symptoms, and this is what we want you to know: PPPD (Persistent Postural-Perceptual Dizziness) happens when the brain gets “stuck” in a heightened state of threat detection after an illness, injury, or episode of vertigo. Even though your inner ear and medical tests look normal, your brai