The perfect pillow does exist. It just might take you a while to find it

One morning in the middle of the summer, I woke up to an excruciating pain searing through my neck and left shoulder. I immediately booked a deep-tissue massage, but the relief lasted a day before the ache returned. After a few weeks of persistent discomfort, I visited my doctor who referred me to a physical therapist. After doing several tests, the therapist identified the culprit: my pillow. Since I’m a side sleeper, my head was collapsing toward the mattress, throwing my spine out of…