Expat insurance customers should avoid having their tongue pierced, as this is a risky procedure.
Snorebond.com dental technician Luis Fairman claimed the most significant danger is that of infection.
Those who perform the piercing quite often "only have a cursory knowledge of dental matters", he asserted.
Articles in the specialist press quite often discuss this risk, the expert pointed out.
Doctors would be the safest professionals to visit to perform this body modification and Mr Fairman recommended this to people who wish to have an oral piercing, admitting: "Whether you could convince them to do one or not is another matter."
However, he suggested that members of the public should simply not have this procedure performed on them.
"Don't go to a tattooist, have the piercing done and then leave it", the expert asserted, adding that visiting a medical expert to check the piercing over immediately after it has been performed is another way to minimise the likelihood of something going wrong.
Other common modifications to the mouth involve the use of braces, of which there are several types.
The most common method of straightening teeth is to use a removable orthodontic appliance, which consists of wires that have been bent on to a plastic plate.
This is the cheapest, according to Mr Fairman, which may indicate it is the most likely to be covered by international health insurance.
Other individuals can have fixed appliances, which are wired and often glued on to teeth, which the expert noted can be "quite expensive".
A registered company called Invisalign produce products that are also comparably pricey but are the most modern version of braces, he added.
These consist of different plastic plates, which shift the teeth around themselves and must be worn for a while before the user moves to a different fitting.
Orthodontic treatments to realign teeth "only go back around 75 years", Mr Fairman declared.