One doctor said: "Puncturing the skin has all sorts of dangers, but I have never heard of a case like this before."
Ljungberg is one of several football stars to have had prominent tattoos. David Beckham has the name of his son Brooklyn and a crucifix figure on his back.
Ljungberg has two tattoos of panthers on his back and side. But the player, who has done extensive modelling in glossy magazines, often bare-chested and revealing his body art, told The Sun that he will now abandon plans to have any more tattoos.