How can I reduce the chances of my parents knowing I had lip injections?

Hello! If you are a minor you should NOT do it without your parents consent (nor can you, legally). Any injectable has the potential to cause bruising and swelling. Be honest with them and respect their decisions, if you are a minor they have legal authority over medical decisions for you. Good luck!

Fillers cause bruising and swelling, try cannulas and use arnika.   But even then you may get bruising.  Makeup can be used. Best, Dr. Emer.

There is a risk of swelling and bruising after injectable fillers. With lips the swelling typically peaks within the first few days and the amount of swelling varies on the individual.

Do not let anyone tell you that they can guarantee you will not have bruising and swelling after lip injection. This is not the reality. You could poke your lips with a needle or cannula, not inject anything, and you would still have swelling and potential for bruising.  The best way to guarantee they will not notice is to stay away from them after injections, utilize ice, and Arnica maybe worth a try as well. To ensure you are receiving the highest level of care, seek out a modernly trained, new-school dermatologic surgeon, oculoplastic surgeon, facial plastic surgeon or plastic surgeon who is board certified and fellowship trained in one of these "core four" cosmetic specialties.

Cameron Chesnut#realself500 Physician

It's hard to say if they will notice or not.  There is always a possibility of bruising after the procedure as well as some swelling.