Rotator Cuff Tendinopathy: 7 Important Insights for Lasting Relief Shoulder Bursitis Dr. Edward Weldon Fixing Shoulder Pain: Harvard Scientists Develop a Method To Restore Damaged Tendons and Muscles Can BPC 157 Heal a SLAP Tear? Vertex PT Specialists Jonathan Struggling with Shoulder Pain? It Could Be Bursitis. Shoulder bursitis occurs when the bursaa fluid filled sac that cushions your shoulder jointbecomes inflamed, leading to pain, swelling, and limited mobility. Common When you have bursitis, even little things, like getting dressed or combing your hair, can really hurt.