Right now I m in pain on my right shoulder going down my arm. I was prescribed by my primary doctor Baclofen for muscle spasm last time I was in her office because Of the pain on my neck down to my shoulder.Few days ago I went to Urgent care because of the side effect of the Diclofenac pain RX because my right hand started swelling and I was in so much pain. It help the pain to subside but I was experiencing abdominal pain, gas, diarrhea and my stool seems black and I was diagnose positive blood in the stool. The doctor advise me to come back after 3 days if no changes, but my abdominal pain ,gas, diarrhea and my stool