i am only 25. how come i always have bad should pain ne. what should i do with it

这么年轻的很多都是因为dominant hand 那边的overuse或姿势不当，造成rotator
cuff tendons和肌肉负担过重。Try to adjust your posture if possible, and together
with self-stretch exercise and massage。

有一小部分人是因为钙质在肩关节的过渡沉淀，也会造成频繁的shoulder pain, shoulder
lock, etc. 这个要去照个shoulder X-ray，找一般的家庭医生就可以做。