You need a thick, firm pillow (high loft) to fill the gap between your shoulder and head.
After spending way too many hours scrolling through r/Bedding, r/Mattress, and r/LifeProTips, I’ve realized that most people (myself included) are sleeping on the absolute wrong setup. Buying a pillow isn't just about "soft" vs. "firm"—it’s about spinal alignment. If your head cricks up, it's too high; if it angles down, it's too low. pillow buying guide reddit
Here is the ultimate Reddit-inspired breakdown for finding your "Endgame" pillow. You need a thick, firm pillow (high loft)