Hello.. Sir you need to get evaluated whether it is muscle spasm cramps or any referred pain... Consult a physician

It seems like a isolated muscular pain. It could be coming from rhomboidus or lower trapezius.. Physios who are expert in myofascial trigger point release can resolve it.. Dry needing could help.

It may due to muscle spasm or refer pain or facet joint problem consult a therapist and do the exercises

Hi there, description of your symptoms suggests anything between spasms or cervical radiculopathy. Have you had any history of neck problem? If yes then it could be a dermatomal pain due to compression of nerve a neck... consult a physiotherapist for a detailed evaluation and precise diagnosis... Hope this helps, thank you.

Pain in shoulder blades on one side, could be because of trapizius muscle spasm. Gradual increase in pain intensity and frequency is suggestive of wrong ergonomic of your daily activity which are adding more stress to your affected muscle. You need to see a physical therapist meanwhile you can use ice application on affected area, followed by that shoulder retraction exercises.