Is it safe to use a do-it-yourself piercing kit?

No, D.I.Y. piercing kits are the bain of a professional body piercers existance. First and foremost folks buy these kits, go home, attempt to pierce themselves, screw up doing it, then come into the piercing studio with an infected mess with junk jewellery hanging our of this misplaced hole and want it fixed. Now my rant is over here's the real goods. D.I.Y. kits are for ear lobes only and not intended to be used for any other body location.

No. Plain and simple, no. Too much risk of infection, injury, death, disease, etc. Dont do it. Spend the 20$ and have it done.