It is unclear how long does a hangover last as the symptoms can vary from one individual to another. Moreover how long does a hangover last will also depend on the occasion as it has been found that in some cases the hangover begins within a few hours after the consumption of alcohol.
In certain cases it is difficult to ascertain how long does a hangover last as the individual continues to suffer from hangover symptoms for several days after consuming alcohol. When an individual consumes alcohol, it leads to dehydration that is caused due to loss of water by excessive urination.
The individual suffering from hangover will be unable to get up from bed the next morning after drinking alcohol as he may be feeling dizzy , excessive fatigue due to dehydration and body temperature.
In severe cases there is excessive flatulence vomiting , anxiety ,severe hunger and lack of depth. According to the experts it is unclear how long does a hangover last or whether it affects cognitive abilities in the affected individual.