It is permissible for a woman to pierce her ears even though that involves pain, for the purpose of wearing earrings, because Allaah has permitted women to adorn themselves with gold and silver and other kinds of jewellery, and women customarily wear earrings.
As for piercing the tongue in order to wear jewellery in it, this is something that is strange and off-putting to those of sound taste. Some kaafir and immoral women are well known for that in the west, and it is one of the causes for the spread of cancer of the tongue, gum disease and loss of teeth among those women, so it is not permissible to do it.
A study undertaken by researchers in Spain has shown that some people have resorted to piercing their tongues or other inner parts of their mouths in order to wear jewellery or studs, and this may lead to health complications affecting the mouth and teeth.
The researchers, from a University in Spain undertook a study of ninety-eight cases where the tongue or some inner part of the mouth was pierced, with the aim of evaluating the health complications that resulted from piercing these tissues.
The results of the study that were published in the Journal of Adolescent Health in November of this year indicate that in 23.5 percent of all cases there was wearing away of gum tissue around the teeth, especially in the eyeteeth of the lower jaw.
It also showed that 13.3 percent of cases suffered from tooth decay. The researchers pointed out that it is essential to warn people of the consequences of piercing any part of the mouth for the purpose of wearing studs, before they go ahead with that.
The American Association of Dental Health Workers also warn people of the consequences of having piercings done in different parts of the mouth, such as the tongue and lips, which may lead to loss of teeth because of the wearing away of gum tissue. In addition to that, piercing the tongue may, according to their report, lead to nerve loss in the affected area, and may even lead in some cases to stroke and blood infections.
We asked a well known university professor in oral surgery and dentistry, and he told us that he has seen that in Germany, where some immoral girls do that, and he said that this is one of the causes of cancer.
As it is proven that this action is harmful and causes these diseases, it is not permissible to do it, because Allaah has forbidden a person to do anything by means of which he harms himself.
And Allaah knows best.