Dear Madam,
A sudden severe shoulder pain could be due to calcific tendonitis. However, a detailed clinical examination by a shoulder specialist is recommended
https://youtu.be/JzWbxt2Rsuc
https://youtu.be/bc5wxFMhvNA
Kindly watch these videos.
Next Steps
www.desaishoulders.in
Health Tips
Kindly visit this website. There are some short videos which will help you understand your shoulder better.
Best regards