Hi, I am a 24 years old male. Ever since I was around 13-14. My cheeks(especially the chin, temple and forehead) and eyes can gets sunken sometimes it looks as if there’s no fat underneath the skins and it can take few days to weeks for it to recover, it usually happens after sleep, good sleep can sometime make it better but not always. First I thought it was hormones but I have my thyroid and sex hormones checked they all normal. I am now thinking maybe it’s some sort of water retention problem?along side the face change, my hair also appears dull and lack electricity.