Its a common occurence. An evening of indulgence, mixing of several brews and liquors, followed by a morning of severe head and in some cases body aches as well. A dry throat, limbs that resist motion, eyes that arent party to opening in short a body thats facing retardation. This is a physical hangover. I recently came across an emotional version of the same phenomenon.
It took me three years to become used to Canada and start enjoying life here and it took one 20 day trip to Pakistan undo all that. I miss Karachi aggresively. Its in my thoughts and whatever I do and whatever I see is compared to Karachi. The food and its relative lack of taste, the house and the significantly dirty room mate, the job, the comfort, the feeling of being home, everything.
And this, this whole thing about constantly reminiscing the good times become an impediment it gets in the way of a leading a normal life, it gets in the way of being able to do work, it gets in the way of organizing life and moving on. This is what makes it a hangover. Sadly, asprin and coffee wont take care of this hang over - I got to live it through, drag my feet through it and then possibly one day, I will wake up fresh and ready to take on Toronto once again.