1. In the absence of physical illness cases, often feel numbness in the neck after the morning acid rises.
2. The pillow has lost elasticity, slapping a is required to restore some flexibility.
3. After managed to adjust my pillow, it quickly back to flat.
4. Pillow agglomeration, rugged, and filler has a damp smell.
Pillow use how long to replace appropriate: there are so many pillows is renewedonly once every four years, in fact, pillows should be replaced once every 1-3 years.