When coming back from a trip to Jeju Island one might experience, "Jeju jet lag" as I am having right now. What is this? You might be asking, since Jeju is just about 50 minutes away by plane from Seoul and doesn't require one to change time zones. Well then, let me enlighten you.
Jeju jet lag is a mental and physical condition where one experiences the rush that comes with leaving Jeju and arriving back in Seoul. The body will immediately feel toasty from all the sunburns but also tired from all the hiking, walking and swimming. The mind will feel a sense of nostalgia for the Jeju country side and vast green spaces. Also, ones mind will feel the readjustment of being back in the urban jungle of Seoul.
To cure Jeju jet lag I recommend heading home, taking a good cleansing shower and hitting the hay. If you have to pick up two cats along the way (one is yours...the other your friend's) for cat sitting, then so be it.
Finally, another way to get over your Jeju jet lag blues is to write a number of posts on said visit.