Welcome to HCM.
It appears that you are having problem of Periocular Puffiness or better known as Puffy eyes. This is common condition caused by fluid accumulation around the eyes. The Periocular Puffiness is most noticeable in the morning after waking. This is due to gravitational redistribution of fluid in the horizontal position. when we are sleeping then the body fluid is having more propensity to get accumulated around eyes. Eyes have loose tissue so can give you appearance of swelling. As the day progresses and you so your normal work the gravitational force is vertical so the redistribution takes away the fluid and improves your condition.
Now the causes can be many ranging from Normal aging, salt excess, Oversleeping, sleep deprivation
, substance abuse
(Alcohol and tobacco). If you are falling in above then you improve with these. If not then can meet a physician who can check for and certain disease state.
But as per your history you should not be worried as it is during holiday only and I think must be related to fatigue
and sleep problem.
A simple solution is to use high pillow under your head. Do keep me informed about your condition.
Have a healthy skin,
Dr Sanjay K Kanodia