How long you can use bed pillows depends on several factors, including the quality of the pillow and your personal preferences. Generally, pillows can last anywhere from 1 to 2 years, but some high-quality pillows can last longer with proper care. Over time, pillows may lose their shape, support, and cleanliness, which can affect your sleep comfort. If you notice significant flattening, lumps, or signs of wear, it may be time to replace your pillow.