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Hangover vomiting can typically be treated with rest, fluids, and sometimes small amounts of mild food that can help with neutralizing excess stomach acid. Hydration is one of the most important parts of treating a hangover because of the diuretic effects of alcohol, and inadequate fluid replacement can often prolong the effects of this unpleasant condition. Drinking alcohol past your body's natural limit and mixing more than one type of alcohol in the stomach are two of the more common causes of a long hangover with nausea and vomiting. While most cases of hangover vomiting pass within a day, persistent vomiting of any ingested foods or liquid for a longer period of time may be a sign of alcohol poisoning that requires medical attention.
The day after drinking a large amount of alcohol, rest is a key component of feeling better when you are hung over to the point of vomiting. Do not go to work or school; simply call in and tell the appropriate party you are vomiting, without further elaboration. The same idea applies to any types of scheduled appointments or obligations. Spend the day resting in bed, ideally where you have quick access to a bathroom during bouts of hangover vomiting. If you are experiencing sensitivity to light, close any window curtains in your room; bright light can sometimes worsen hangover nausea in this case.
Consistently drinking enough water before and after consuming alcohol is one of the most effective ways to minimize hangovers. While hangover vomiting is the body's natural way of expelling toxic alcohol by-products, it can also usually get rid of any other fluids the body needs to recover. Sip small amounts at a time from a glass of water while recovering from a hangover, but do not drink large gulps at first to avoid further irritating the stomach. Sports drinks can be good sources of replacing lost electrolytes and glucose, and mild juices such as grape or apple can also help with the rehydration process.
Certain foods such as bland crackers and dry toast are effective at reducing hangover symptoms. Eating small amounts of these can help lessen the acidic effects of the broken-down alcohol by-products that often creating burning sensations in both the stomach and throat during hangover vomiting. These kinds of foods should be eaten slowly at first, ideally after you are able to drink and keep down at least one glass of water, juice, or sports beverage.