Using the same repetitive needle and ink work as a normal tattoo, inner lip inking, mostly on the lower lip, are currently taking the body art world by storm.
Now the trend is going viral online, with people rushing to show off their etchings with like-minded people on photo sharing sites.
One dedicated Hello Kitty fan has opted to get the logo inked into her lower lip in a increasingly popular body art trend
Most inner lip tattoos are a line of plain text, in part simply due to the lack of space for larger designs
Despite the reportedly high level of pain experienced if the inner mouth is tattooed, some brave souls still opt to have their designs coloured in
These types of tattoos frequently fade, with most lasting about 5 years, but some reportedly disappearing in months
Those who have had inner lip tattoos often share the finished design on social media sites dedicated to
This person has chosen to express their dietary lifestyle, writing 'Vegan' inside their lip
This man has opted for the outline of a rather busty lady reclining inside his mouth
Some tattoo fans, however, report not feeling any pain at all.
More problematic is the short life span of inner lip tattoos, with most lasting just five years, although some reportedly last less than a few months.
Some tattoos are rather humorous, with one joker having a moustache drawn on his upper inner lip
Requiring the same repetitive needle and ink work as a normal tattoo, tattooing inside the lips has been rapidly gaining in popularity
Hidden from view, lip tattooing allows people to be more adventurous than with more visible inking
Some people chose to use the tattoo as a secret message, with one couple choosing to have 'forever' inked into one of their lips, and 'and ever' on the other.
This man has rather ironically chosen to have 'sore lips' tattooed. Due to the number of nerves in the mouth, having any inking inside the mouth is significantly more painful than other tattoos