Splitting headaches, sickness, dizziness, dehydration: anyone who's ever drunk too much knows the consequences.
Alcohol makes you pee more, which can lead to dehydration. Dehydration is what causes many of the symptoms of a hangover.
Hangover cures are generally a myth. There are no cures for a hangover, but there are things you can do to avoid one and, if you do have one, ease the discomfort.
To avoid a hangover:
Dealing with a hangover involves rehydrating your body to help you deal with the painful symptoms. The best time to rehydrate is before going to sleep after a drinking session.
Painkillers can help with headaches and muscle cramps.
Sugary foods may help you feel less trembly. In some cases, an antacid may be needed to settle your stomach first.
Bouillon soup (a thin, vegetable-based broth) is a good source of vitamins and minerals, which can top-up depleted resources. It's also easy for a fragile stomach to digest.
You can replace lost fluids by drinking bland liquids that are gentle on your digestive system, such as water, soda water and isotonic drinks.
Drinking more alcohol, or "hair of the dog", does not help. Drinking in the morning is a risky habit, and you may simply be delaying the appearance of symptoms until the extra alcohol wears off.
If you've been drinking heavily, doctors advise that you wait at least 48 hours before drinking any more alcohol (even if you don't have a hangover), to give your body time to recover.
Sometimes, of course, a hangover makes this advice easier to follow.
To keep the health risks from alcohol to a low level, if you drink most weeks:
14 units is equivalent to 6 pints of average-strength beer or 10 small glasses of low-strength wine.
A 750ml bottle of red, white or rosé wine (ABV 13.5%) contains 10 units.
Use our guide to find out how many units are in your favourite tipple.
Content provided by the NHS