Deep in your inner ear sit three fluid-filled canals that tell your brain which way your head just moved. In BPPV, tiny calcium crystals come loose and drift into one of those canals. Now a position change, rolling over, looking up, bending down, sends a false signal about motion, and the room spins for a few seconds. Other causes look different. Vestibular neuritis inflames the balance nerve and brings days of constant dizziness. Meniere’s disease pairs vertigo with ear fullness or hearing changes. Vestibular migraine brings episodes with headache and light sensitivity. A stiff, injured neck can do it too. Lightheaded on standing is usually blood pressure or medication, and that one belongs to your physician.
They do not sort themselves out, and that is why yours has not. Medication like meclizine turns down the alarm, it does not move a crystal out of a canal. And after an inner ear illness, the brain needs specific head and eye movement to recalibrate. Avoiding every trigger, which is the sane thing to do, is exactly what stalls that process. Testing is what separates them: positional testing and watching your eye movement tell a licensed physical therapist which canal or which system is involved, and the plan follows from that.