Body piercing when done by a professional piercer using sterile tools and body jewelry almost always is a safe and practical thing to do, unless you fall into one or more of the following conditions; you faint or bleed easily (or take blood-thinning medication), you are prone to seizures, you are pregnant, or you are under the influence of drugs or alcohol.
If you are prone to bleeding, fainting, seizures or other drastic physical reactions to trauma (which piercing is), you must mention this to your body piercer, and ideally, avoid getting pierced. Also, if you are pregnant, you should not have a tattoo or body piercing of any kind during your term as you would be exposing the unborn child to a possible mortal infection. And while many people feel more ‘courageous’ or claim to feel less pain while under the influence of drugs or alcohol, it is not a good idea to have a body piercing or tattoo done in this state since your judgement is impaired and you risk detrimental side-effects such as excessive bleeding (alcohol thins your blood) and other physical reactions. Always have your body piercing or tattoo done with both eyes open and with a clear and sober mind. You’ll be glad you did!