Simple shot could ease stubborn shoulder pain without surgery

This study tests whether injecting a common steroid into muscle trigger points can relieve long-term shoulder pain and certain headaches as well as injecting into the joint. About 1,000 adults aged 45 and older with shoulder arthritis will receive either a trigger point or joint injection and be tracked for two years. The goal is to offer a simpler, safer option for people who haven't gotten relief from standard treatments.