Many people suffer from an upset stomach or diarrhoea because of something they have eaten or drunk abroad.
More seriously, cholera, typhoid and hepatitis A can be contracted from contaminated food and water.
Unfortunately, drugs are increasingly being used in rape and other crime.
Once someone has added drugs to your drink, you won’t normally be able to detect them. Rape drugs can also work in non-alcoholic drinks, such as coffee and tea.
They are normally colourless and tasteless, and can make you virtually unconscious and defenceless.
Never leave drinks unattended and its best not to accept drinks from strangers.
If you begin to feel strange, sick or drunk after only a couple of drinks tell a trusted friend. They should take you to a safe place, such as your hotel room.
If you are alone, phone the local police, a hospital or the British Consulate. And always try to drink responsibly - alcohol is the most frequently used drug in drug-assisted rape.
It is illegal to bring any meat or milk-based products into the UK from any country outside the European Union, even for your personal use.
There are also limits on bringing back other food items, including fish, shellfish, honey, poultry, eggs and certain types of fruit and vegetables.
The rules apply whether you are bringing these food items back into the UK yourself, if a friend or relative is bringing them as a gift, or if they are sent in the post.
It is not worth bringing illegal food items back into the UK - you risk: