Sponsored by Anita Mandal, M.D. Question: I’ve heard of a few doctors using cannulas for injection of fillers instead of needles. What are the benefits of cannulas and do they hurt more than needles?

A cannula is a thin tube that doctors insert into a person’s body cavity, such as their nose, or into a vein. Doctors use them to drain fluid, administer medication, or provide oxygen. A person can ...