pain in deltoid You are here: Orthoped > Physical Therapy Questions > pain in deltoid admin 0 Comment Physical Therapy Questions I have devleloped pain deep in the deltoid muscle from playing tennis. It hurts worse when serving. What could this be and how can I treat it? Thank you Related Postssevers disease/bursitis (1) lower back pain (1) quad muscle (1) popping in pelvis (1) achilles tendon (1) bicep tendonitis (2)