I'm sorry to hear about the pain and loss of sensation you're experiencing. These symptoms involving your left elbow, shoulder, fingers, and back could suggest nerve involvement or musculoskeletal issues such as nerve compression, cervical spine problems, or inflammation.

Here are some important points to consider:

• Pain near the elbow and shoulder with finger numbness may indicate nerve irritation or compression, possibly from conditions like cervical radiculopathy or peripheral nerve entrapment.
• Back pain accompanying these symptoms could be related to spinal issues affecting nerve roots.
• Over-the-counter medications like non-steroidal anti-inflammatory drugs (NSAIDs) can help reduce pain and inflammation, but they should be used under medical guidance.
• Persistent or worsening symptoms, especially loss of sensation, warrant prompt evaluation.

Recommendations:

• Please consult an orthopedic specialist or a neurologist for a thorough clinical examination and appropriate imaging studies.
• Early diagnosis and treatment can help prevent potential complications and improve outcomes.
• If you experience worsening weakness, severe pain, or loss of bladder/bowel control, seek emergency medical care immediately.

Taking these steps will help identify the cause and guide effective treatment.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand you have pain near your left elbow and shoulder, along with loss of sensation in your fingers and back pain.