Owen Groves with his temporary henna tattoo which went horribly wrong. See MASONS story MNTATTOO: Two schoolboys have been scarred for life after temporary tattoos burnt into their skin on an Easter Holiday from hell. Liam and Owen Groves pestered their mother to allow them to have henna body art while on an all-inclusive holiday in Egypt. But instead of natural henna which dyes the skin brown the tattooist used super strong black henna. On the plane home Liam, 16, and Owen, 14, couldn’t stop itching and had to be pulled out of school when they returned to the UK as they were writhing in agony from sores.