Common issues that could occur include infection where the piercing is; this risk is increased more with other health risks. Infections can possibly be critical, life-threatening and include your entire body.
Another risk is tearing the skin, which can create scar tissue. Other problems can come from the kind of body jewelry used, including allergies to metals. Therefore, you should only use hypoallergenic jewelry, and for new piercings, use stainless steel, gold, platinum, niobium and titanium. Also, be sure to use a sterile method; if you don’t there is a likelihood of spreading potentially life-threatening diseases.