@seekinginfo @tsjimt Seekinginfo makes a very valid point that can be easily missed. I have experienced vertigo because of muscle spasms that move my cervical vertebrae by either twisting them or tilting them independent of any of my voluntary neck movements. The vertebral arteries run up the inside of these vertebrae and that is part of the blood supply to the brain. If vertebrae gets turned, those arteries get stretched and perhaps narrowed and that caused vertigo for me. Realigning my neck correctly resolved it completely. Allergies also increase ear fullness and pressure/pain in the ears. I think a physical therapist could be very helpful in diagnosing to determine if spinal alignment is correct, and if not, then to be able to provide treatment. I also have a condition called thoracic outlet syndrome that causes neck/shoulder tightness, and it is worse on one side, so that sets up the scenario for rotation to occur due to muscle spasm. TOS can be caused by a whiplash injury, bad posture, a repetitive stress injury or even be congenital based on physical build.