Buying Restylane Online and Injecting Yourself?

This is a really, really bad idea.  First, you do not know what you are getting through the internet.  There are lots of dangerous imposter drugs and materials out there.  It is also illegal to purchase these items from out of the country, (which is where most of these sites are).  Next injection yourself is also a very bad idea.  One needs to know the anatomy to avoid potentially serious pitfalls.  The angles that one needs and feedback are also compromised.Please see an experienced injector.

Most things these days can be bought over the internet - whether it is legal, pure ingredient, sterile, not adulterated is a big worry but not the biggest. The biggest danger is you !
A Doctor Who Operates On Himself Has A Fool For His Surgeon is the corollary to: A Lawyer Who Represents Himself in Court has a Fool for His Attorney. Both o these maxims involve highly trained persons. Just imagine how bad it would be if they were not.
THIS IS JUST WHAT YOU ARE DOING !
Not to mention practicing medicine without a license which is illegal in all States in the US. It is downright dangerous and you are highly likely to have complications too numerous to list.  It just isn't worth it.

To self inject is not a good idea. Restylane is a controlled drug that requires a doctor to obtain the product. Online sources are either illegal or the product is not really Restylane. Injecting Restylane requires education in injection techniques and experience.  So it would be illegal and foolish to order and use an online product.