As a medical student in the 60s we were categorically and melodramatically told by the politically-insensitive VD consultant (as was his title then) - "Aha, the tattooed lady, check her WR (test for syphilis) - nearly all tattooed ladies are prostitutes"!
Well, maybe times have changed a bit, but there was a time when getting tattooed also ran the risk of acquiring Hepatitis B or C or HIV from use of unsterile equipment. Hopefully tattooists have cleaned up their act since then in order to stay in business. And as any plastic surgeon knows there are people queuing up to get no-longer-loved tattoos removed by laser: I think that in most if not all UK health authority areas this is no longer entertained as something to be done on taxpayers' money (i.e. NHS-funded). So please do think long and very hard before getting a tattoo in the first place.