What are the main causes of shoulder pain and arm numbness?

The main causes of shoulder pain and arm numbness include cervical disc herniation. When cervical or lumbar discs herniate, the areas of the arm innervated by affected nerves may experience symptoms such as pain and numbness. In such cases, oral anti-inflammatory painkillers and neurotrophic medications may be helpful. Additionally, these symptoms can also result from muscle fatigue. It is important to visit a hospital to determine the underlying cause; if cervical spondylosis is diagnosed, prompt treatment should be initiated.