seems like 'shoulder pain' issues are rocketing up the top of the pops complaint charts lately.
i wonder iffn it has anything to do with the also epidemic issue of people sitting too much. nah, it can't be that easy an ezpz explanation, can it?
yup, it is.
here's a classic solution not involving drugs, quacks, or the dependent need to lug around pillows when u leave home - exercise.
get a weight lifting bar (even just starting with the bar and no weights, or a broomstick is a great start.) put a few pounds on it to start, with an eye towards slowly increasing the weights over time. do a dozen or so curls, then do a dozen or so lifts in front of ur mug up to over ur head. alternate this move with lifting it up to behind ur head this time or next. no magic number or routine, but one or both of these lift up moves will prolly result in an aha! moment of pain as u learn where the problem is.
lather, rinse, repeat 3/ 4 times a week, and before u know it, a month or so will go by, and u'll realize that, well, let's just call it 'enlightenment.'
u can build muscle at any age, so strengthening the collateral muscles to the affected area is just, well, let's call it 'enlightenment, ie, lightening the load that ur cranky part is expected to carry. and, get out of the chair more often.