The result of heavy drinking of which results in an alcohol blood content that still exists long after drinking because your liver is still trying to cope with the detox. As a result the liver uses water to metabolize the alcohol, this water is obtained from the body and often the brain which has a high concentration of water, this lack of water that is a result of metabolism causes the membranes in the brain to tighten thus causing the headaches and body aches often are another result.
Concise, accurate, truthful. Although, personally, I prefer the following definition…
Nausea and headaches often caused by way too much fucking alcohol. Can be identified by the ashtray in ones mouth,the vomit on last nights clothes,the want to never drink or eat again,the great dislike of sunlight, the undesirealbe urge to apologise to all the people you spent the night with, the stranger in your bed and need for a glass of water and many many asprin.
I have a theory that on this island the frequency of hangovers on a per-person basis is signficantly higher than in the general, global population. Even if you include Russian men. Seriously.