If you’re a side sleeper who wakes up with a stiff neck, shoulder pain, or allergy symptoms like sneezing and congestion, your pillow could be the real culprit. Studies show that nearly 60–70% of adults sleep on their side , and research in sleep ergonomics confirms that improper pillow height and materials can significantly increase neck strain and disrupt sleep quality. Add allergens like dust mites or mold into the mix, and your pillow can quietly sabotage both your comfort and health. Choosing the best hypoallergenic pillow for side sleepers isn’t about luxury—it’s about spinal alignment, pressure relief, and breathing easier at night. This guide breaks down exactly what to look for, what to avoid, and how to make a smart, health-focused choice. What Is a Hypoallergenic Pillow? (Quick Overview) A hypoallergenic pillow is designed to resist common allergens such as dust mites, mold, mildew, and pet dander. These pillows use tightly woven covers and materials that naturally repel o...