The deltoid is a large muscle responsible for lifting the arm and giving the shoulder its range of motion. Pain in this area may be due to issues like overuse or injury. The deltoid is located in the ...

It’s worth noting that most, but not all, vaccines are given in the muscle – this is known as an intramuscular injection. A healthcare worker administers a dose of the Pfizer-BioNTech Covid-19 vaccine ...

The deltoid is a round muscle that goes around the top of your upper arm and shoulder. The main function of the deltoid is to help you lift and rotate your arm. There are three parts of the deltoid ...