Puts pressure on points in neck and head where muscles contract, causing muscles to relax. Uncomfortable for side sleepers . Today, we pass up porcelain in favor of thick, soft pillows that cushion our heads. This may cause insomnia, headaches, irritability or a stiff neck, and may even lead to future back problems. Pillows that support the neck maintain the proper cervical curve.
Cervical pillows are usually most comfortable for people used to thick pillows.
Dierenfield advises back sleepers not to use a pillow. However, he believes side sleepers or people who like thick pillows will benefit from a good cervical style.