I am having numbness in my left arm and hand. I have a history of neck problems. I jammed my head into a low hanging pipe at work this week sending my head between my shoulders. My previous diagnosis was a strained muscle. I get pain in my neck about 2-3 times a year that starts around the big knot in my upper neck.
Hello, I read carefully your query and understand your concern. The symptoms seem to be related to a pinched nerve in the shoulder. I suggest using anti-inflammatory medications such as Acetaminophen to relieve the pain. I also suggest maintaining the arm and hand immobilized to prevent further damage. Hope my answer was helpful. If you have further queries feel free to contact me again. Kind regards!  Chat Doctor.