Amy Winehouse has been warned that she could become infected with gangrene at the Glastonbury Music Festival.

The troubled singer, who has been receiving medical advice about the persistent presence of sores on her face, has been warned that she must avoid all contact with mud if she does not want her condition to worsen when she headlines the British music festival with rap mogul Jay-Z later this Summer. Doctors have suggested Amy be accompanied to the festival by a nurse, who would bandage her face overnight to prevent the onset of infection.