Off Duty on a Military Installation
Members are prohibited from attaching, affixing or displaying objects, articles, jewelry or ornamentation to or through the ear, nose, tongue, or any exposed body part (includes visible through clothing). Pierced earlobes on women are allowed but should not be extreme or excessive.
Also, are you allowed to have piercings in the military?
When on any Army installation or other places under Army control, soldiers may not attach, affix, or display objects, articles, jewelry, or ornamentation to or through the skin while they are in uniform, in civilian clothes on duty, or in civilian clothes off duty (this includes earrings for male soldiers).