One in ten adults in the UK has had a body piercing somewhere other than the earlobe; of these 28% experienced complications and 1% were admitted to hospital, according to a survey of 10,000 adults. Body piercing is three times more common in women than men. Navel piercings are most common amongst women, whereas men are more likely to have a nipple piercing. Swelling, infection and bleeding are common side effects, and tongue piercings are the most risky. Serious complications resulting in hospital admission mostly occur with piercings performed by non-specialists, rather than those carried out in a tattoo parlour or specialist piercing shop. In other countries people have been infected with hepatitis B and C and HIV.