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
Your consideration of an impinged nerve is valid as this would present with the same symptoms you are experiencing. Other causes would include muscle tension and inflammation causing this type of pain. This is usually related to stress, fatigue, and overuse of the involved extremity. There could also be a problem in the blood supply of the arm caused by problems with blood pressure, sugar control and cholesterol. The ringing on the ears may be a different problem, but may reflect some form of micronutrient deficiency (like the B vitamins).
Since there are a lot of possibilities, it is best to have this evaluated by your doctor. For now, adequate rest is strongly recommended.
Regards and God bless.