left side sleeping for glymphatic drainage (actual reason your face is puffy in the morning)

[ceorl]

your brain has a waste clearance system called the glymphatic system. runs almost exclusively during sleep, flushes metabolic waste and toxins out of brain tissue. left side sleeping facilitates it significantly better than right side or back.
facial puffiness in the morning is largely lymphatic fluid that didn't drain properly overnight. if you're waking up looking bloated and soft this is probably why
secondary benefits: reduced sleep apnea severity, better gastric drainage, slower resting heart rate. most great apes sleep on their sides, it's literally the natural human position
only downside is hip and spine misalignment. fix it with a small pillow under your neck and a body pillow between your knees. takes a few nights then you won't go back
also get a silk pillowcase if you don't have one already. reduces mechanical compression on your face that makes the puffiness worse. not just a hair thing
try it for a week and check your face first thing in the morning. difference is noticeable