If you're not old enough to walk into a professional shop and get a tattoo legally, then your only option is to get it done by some scratcher or do it yourself. Both are bad choices and could lead to serious infection and a bad tattoo.

 2. You Don't Have Enough Money.

The tattoo you want costs twice the amount of money you have, so what do you do? Too often, people opt to find someone who will do it cheaper and end up very disappointed with the results. When it comes to body art, you shouldn't be looking for a bargain.

 3. You're Not sure of what you want to get.

If you're not absolutely sure about the tattoo design you want to get - or if you've only been absolutely sure for a couple of days after changing your mind several times before - you're really not ready to get the tattoo yet. There's too great a chance that you'll end up regretting it later on.

 4. You Don't Understand the Language or Symbolism of Your Chosen Design

The symbols may look pretty, but there are websites dedicated toward making fun of people who got tattooed in a foreign language they couldn't read, because the translation was incorrect!

 5. You Lost a Bet/You're Being Pressured into It

Getting a tattoo is a big decision and shouldn't be made lightly and certainly shouldn't be the result of peer pressure. Don't make any bets that end with someone getting a tattoo, and don't let anyone pressure or force you into getting something you don't want. It's your body, and you're the one that has to live with it.

 6. If I get tired of it, I can have it removed.

Getting a tattoo with the mindset that you can have it removed later on is a bad way to start something so permanent.  Removal is Very Expensive and can leave scars. Some pigments don't remove well.

 7. You Want the Name of Someone you’re In a Relationship with

Name tattoos last longer than some relationships. Relationships end, and if it does you're still stuck with a permanent reminder of a failed relationship. 

 8. You Have Health Issues That Could Interfere With Your Ability To Heal

Some health problems could cause serious problems during the healing process of a tattoo. Diabetes, heart problems, and circulation issues are just a few that could make getting a simple tattoo very dangerous. The same goes for medications that thin the blood. 

 9. You're Not Sober

You probably can find someone to tattoo you while under the influence of drugs and/or alcohol, but it's in your best interests to be sober. People make stupid decisions when inebriated. Not a great idea.

 10. It's an Unclean/Unsafe Environment (Tattoo Party, Outdoor Event, Home        Tattooer)

Getting tattooed at a party or outdoor event may seem exciting, but it's a bad idea. You have no idea who the artist is, what their qualifications are, do they use sterilization or what outside elements you might be exposed to.  Tattooers who are here one day and gone the next have no responsibility for their clients safety or the outcome of their tattoos. It's best to go to someone you know and trust.