While expression lines affect everyone, how you sleep can also impact how lines form on your face.
Expression Lines
Expression wrinkles form along the dynamic lines that appear when you laugh, smile or frown and are the most common.
Sleep Wrinkles
Sleep wrinkles form in a slightly different pattern based on how your face is positioned when you sleep.IV If you routinely sleep on your side or stomach you may develop sleep wrinkles in addition to expression lines.