Side sleepers, the pillow should be higher under your neck than it is under your head. If you sleep on your side, you want to keep your chin straight ahead in a neutral position. But some people tuck their chin into a fetal position. This forces your head forward and may cause pain. Memory foam pillows are available in many various styles. A good example of these is the Sleepsia Memory Foam Pillow which can be used by all types of sleepers.