While one obvious possibility is muscle strain according to the Lancaster Orthopedic Group there are another five potential reasons for pain between your shoulder blades and some need urgent attention ...

Upper back pain between the shoulder blades may result from poor posture ... Injuries to these muscles can cause upper back pain. The feeling can be a dull ache or a sharp pain.

Some of the symptoms of referred pain from your neck include: stabbing, burning ... You may also feel pain in your back between your shoulder blades. The pain may be sudden and sharp.