The wearing of the shoulder suspension sling may well be the source of the pain radiating to your pinky and wrist and the bluish discoloration noted by your wife.
The wearing of a sling for a protracted time, as has been required in the post surgery course of your shoulder, secondarily keeps the elbow and wrist and hand more mobilized than intended. A consistently bent elbow will cause reduced blood flow perfusion to the lower arm and hand (the bluish discoloration noted by your wife) and transient nerve compression of the ulnar and median nerves more than the radial nerve.
Patent vascular perfusion depends on active movement of the body part in question. It is the act of muscles contracting and relaxing that serves as a type of internal muscle and soft tissue massage, keeping the flow of blood and lymph fluid circulating and nerve signals traveling as they are meant to.
In wearing a sling, it is second nature to limit active movement of the elbow, wrist, hand, and fingers. Bit this lack of inherent movement of joints distal to the shoulder comes with a cost - low tissue perfusion, sluggish blood and lymph circulation, joint stiffness, disrupted transmission of nerve impulses, swelling, et al.
Your MD aid on tract with referring you for additional physical therapy sessions. Always communicate to your therapist regarding how the PT treatment sessions are affecting you. A good therapist is constantly evaluating and treating - adjusting the treatment plan in response to you the patient, individualizing your plan of care. Speak up if an exercise or modality feels "wrong" to you and your body.
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