This forum is for questions and support regarding neurology issues such as:
Alzheimer's Disease,
ALS,
Autism, Brain Cancer,
Cerebral Palsy, Chronic Pain,
Epilepsy,
Fibromyalgia, Headaches, MS, Neuralgia, Neuropathy, Parkinson's Disease, RSD, Sleep Disorders,
Stroke, Traumatic Brain Injury
It would appear that some of your symptoms may be related to an ulnar nerve compression/impingement/injury. The previous shoulder injuries could theoretically cause such an injury.
The pain symptoms at the back could still be related to nerve impingement at the shoulder area with referred pain to the back.
You could have an orthopedist or neurologist evaluate the possibility of a shoulder condition causing the symptoms.
Hope this helps.