What's Wrong With Your Shoulder?

It’s not just a simple joint -- it’s a complex structure of muscles and tendons (which hold your muscles to your bones). It lets you scratch your back, drive your car, or get something off a shelf. But all those moving parts mean things can go wrong, which is why so many people have shoulder problems at some point. 

https://www.webmd.com/pain-management/ss/slideshow-shoulder-problems?ecd=wnl_day_071020&ctr=wnl-day-071020_nsl-LeadModule_cta&mb=Rg22Ql%40oJIu7r%2f64EoEV8RJZpsk9%40mj5mU6FJ89PBao%3d