Usually, when we drink too much alcohol, we experience an extreme headache, nausea, vomiting, etc. the next morning. This condition is called a hangover. Now, we get a hangover because alcohol is a diuretic. This means it makes you urinate a lot, making us lose more water and thus, causing our body to get dehydrated. When our body gets dehydrated, it begins to steal water from the brain, causing it to shrink and thus, giving us a hangover headache. In addition to this, when we drink alcohol, our liver breaks down the alcohol into toxic acetaldehyde and then, into harmless acetate. However, when we drink too much, we cannot convert toxic acetaldehyde as quickly as usual. Hence, it begins to build up in our body and thus, causing hangover nausea and vomiting. Moreover, different types of alcohol have different amounts of congeners, which are basically impurities. If we drink the alcohol which has more congeners, then it can increase the severity of a hangover. Also, don't forget to subscribe to our YouTube channel.