This is due to the improper posture
as while sitting in front of the computer and it leads to neck pain
and thereby it leads to shoulder pain.
It is called as peri arthritis
shoulder and for that you can do hot water fermentation and ice therapy at home. If you have shoulder pain
then the stiffness will develop more that might make the arm to have less improvement which might make you to feel more pain
the arm. And also cervical pillow can be used which might make you to have better posture of the shoulder neck and arm.