Shoulder injuries and disorders

What is the definition or description of: Shoulder injuries and disorders?

I've had bursitis in my right shoulder for 23 months, diagnosed by MRI last year. I'm now randomly having the same issue with my right hip, about 2 months. I'm becoming concerned these aren't injuries, and I have some kind of inflammatory disease?

My cousin's left shoulder down to her left leg are dead. Doc said it's not a stroke. I wonder what kind of disease is that? She has no injury but a little obese.

I am 40 years old , carotid dissection chances ? No injury or disease. pain in right side of neck, clear ct scan or neck and head 4 months ago . Pain at times radiates up to head or down to shoulder blade ?

Sudden sharp shooting pain just below my left shoulder blade and a little lower down my back. It hurts to breathe deeply or move certain ways. I have hashimotos disease and am hypothyroid. I haven't had a back injury. Any insight into possibilities?

Can you tell me how i could deliberately injury my own shoulder?

A book case fell on my shoulder, what kind of injury could i have?

How long can shoulder injury last?

How shall I treat my shoulder injury?

What are some common shoulder injuries?