I have a sharp pain in my shoulder .just 4 inches down to shoulder on my back side. The pain goes from down of shoulder in towards my hand uptill the ting finger. It seems as a complete line or a vain is paining. Specially when I use pillow. It starts exactly from where my left hand join my body. N travel through all my hand and goes upto the ring finger. Specially when I hold my phone up while I am lying in bed. I can not even sleep my left side it starts paining. Kindly suggest.