I had cheek implants over 4 years ago. I now want to get my microblading on my eyebrows. Am I safe?

Hello milanfc10101010,
There should be no need to worry as long as the procedures are performed by an experienced licensed professional in a sterile setting, preferably with a physician available on site and that you follow all post care instructions. 
Best to you,

Be careful that who ever does the microblading does it under sterile techniques so that you reduce the risk of infection