Originally, piercing ears is prohibited for male Muslims as it is an imitation of females.
The Islamic Religious Council of Singapore, states the following: Male muslims are not allowed to pierce their ear to adorn it with accessories such as earrings. This fashion is for women only. Muslims must not imitate the other gender.
If a male Muslim has pierced his ear for such sake, he must remove all the accessories hanging on his ear. He should then repent to Allah and do many good deeds in the hope that those deeds can cover the sins he committed.