Waking up with a stiff neck or a sore shoulder can be frustrating, especially when you went to bed hoping to feel rested. For many side sleepers, discomfort may show up as pressure around the shoulder, tension near the neck, or the constant need to adjust the pillow during the night. It is easy to assume that the solution is simply buying a softer or firmer pillow. But comfortable sleep usually depends on several factors working together, including pillow height, body positio