Your pillow is an important part of your sleep experience, so it's essential to replace it when it's no longer providing the support and comfort you need. However, the frequency of pillow replacement can vary depending on several factors.
One consideration is the type of pillow you use. Memory foam pillows, for example, often last longer than traditional fiber fill pillows. Memory foam pillows tend to maintain their shape and support over time, while fiber fill pillows may become flattened or lumpy after a period of use.