Not only will having another pint of booze not help you in any way, shape or form, but it will actually just make things worse. "Bad idea," Dr. Hall-Flavin from MensHealth.com states flatly. "It will provide a numbing effect, but all you're doing is prolonging the inevitable, and it will likely make your headache worse." The crew over at alcoholrehab.com further state that:
"While drinking alcohol after a heavy night of drinking may lessen the effects of a hangover it is not something that is recommended. Any reprieve from these symptoms will only be temporary and there are real dangers to drinking off a hangover including: Drinking alcohol in the morning is a common symptom of alcoholism."
In my mind it would make sense: because you are having some more of the substance that caused you to feel so bad in the first place, you are only aiding to further dehydrate your body and therefore mostly only delaying the symptoms from showing up. There are some articles that suggest more alcohol the following morning is a good idea, stating that adding more alcohol allows the liver to focus on the new alcohol and "forget about the bit from the previous night". Again, this will make you feel mildly better, but only until the "newly introduced" alcohol starts getting digested by the liver so just repeating the cycle as I have suggested.