According to these experts you should always avoid sleeping on your side because it could make you look older.
The pros at Best Life explained since your face is pressed against the fabric of your pillow for prolonged periods of time, it's the worst position for wrinkles.
Beth Goldstein, MD said: “Sleeping on your side can lead to some wrinkling.”
Simply put, when your face is smashed up against your pillow for hours at a time you face is more likely to crease in those same places. The same goes for lines on your chest.
They say sleeping on your stomach might be just as bad for wrinkles. Sleeping on your back is the best option to avoid putting the pressure on your face that can cause the wrinkles.
Source: NY Post