No Jew should ever get a Tattoo... It is an obvious violation of a Mitzvot...
No Jewish man should ever get a piercing, unless for medical reasons... It is against Jewish law.
What medical reasons are there to get a piercing?
http://www.oztorah.com/2008/01/body-piercing-ask-the-rabbi/
Q. Does Judaism allow alterations to one’s skin, e.g. body piercing?
A. Tattooing is viewed negatively as its origins were idolatrous (Lev. 19:28; Maimonides, Hilchot Avodah Zarah 12:11), even though, technically speaking, it is banned only if done with indelible ink and in the form of writing (Makkot 3:6; Shulchan Aruch, Yoreh De’ah 180:1).
Cosmetic surgery raises the halachic issues of intentionally wounding oneself, risking infection, etc. Rabbinic responsa permit it for psychological or medical reasons (e.g. after an accident) but not for mere vanity, especially among males, unless the operation is common practice in the place concerned (see I. Jakobovits, “Jewish Medical Ethics”).
Piercing the ears was a mark of servitude in Biblical times (Ex. 21:6), yet ear- and nose-rings were often worn by women. For men to wear them would presumably infringe the prohibition against cross-dressing. The problem today is that some people insert rings in strange parts of their person as a mark of vanity or frivolity. Even if what is done is not likely to be hazardous to health, vanity or a sense of fun is no justification for immodesty - or for “meshugass”. The basic rule is that the body is the property of the Holy One, blessed is He, and its dignity must not be compromised or its integrity invaded. Instead of overdoing the preening of the body, one should work on one’s mind, heart and soul.
http://www.jlaw.com/Commentary/piercing.html
Body piercing is not a new phenomena. The Bible makes reference to noserings and earrings. In recent years, this ancient art has experienced a revival, and is moving into the mainstream. While pierced ears have long been commonplace, a growing number of people now the pierce noses, navels, nipples, tongues, and even genitalia. What does Halacha have to say about body piercing? (Space limitations preclude discussing other Halachic issues such as honoring parents, concerns about the safety of certain piercing procedures, or a discussion of tattooing, which is specifically prohibited by the Bible).
Jewish law prohibits one from hitting and wounding others. The Talmud (Baba Kama 91b) records a debate whether it is permitted for someone to wound himself. The great majority of medieval authorities accept the opinion that self wounding is forbidden. (Shulchan Aruch Choshen Mishpat 420:31).
At first glance, this Halacha is perplexing. It seems reasonable to prohibit someone from injuring another person when she protests; that is an breach of another's fundamental rights. However, why would Halacha prohibit self wounding? Rabbi S.Z. Zevin answers (L'Or HaHalacha pages 318-338; cf. Minchat Hinnuch 48) that man is not the master of his own body. God is the one who grants life, and maintains full rights to the human body. "The Lord gives and the Lord takes" is not a mere phrase, but rather a statement of fact: God owns man's body. Consequently, self inflicted wounds and suicide are forbidden, because the human body belongs to God, not man.
The prohibition against self wounding would seem to preclude body piercing. But it isn't that simple. Not all wounding is prohibited. If a doctor needs to operate on someone, the operation is permitted even though the doctor will wound the patient in the process. This is because wounding for therapeutic purposes is allowed. In evaluating the permissibility of body piercing, we must ask the following question: Is wounding for reasons of beauty is allowed?
...