According to Dr. Geria, neurotoxins are most effective in areas where the muscles tend to be overused—like the forehead area—and result in "dynamic wrinkles" (meaning wrinkles caused by facial ...

The masseter is a muscle on the side of your face that helps you chew. Injecting Botox into this muscle can relieve symptoms of teeth clenching or grinding. It can also help contour your jawline.

Bodybuilders and others who want to take a shortcut to bigger muscles may be tempted to inject a compound called synthol directly into their muscles. While the effects are almost immediate, and ...

An intramuscular injection delivers medication into a muscle. Doctors frequently use intramuscular injections to administer vaccines and certain other drugs. Injection sites include the upper arm, hip ...