Why is there arm or neck pain from heart?

Referred pain. The nerves that innervate the heart branch off a main nerve trunk that also sends branches to the neck and into the left arm. Therefore when one of the branches senses painful stimuli, the brain cannot determine which branch the stimuli is coming from. Similar cases of referred pain occur from gall bladder pain (cholecystitis) causing right shoulder pain.
Referred pain. The pain that some people have in their arm(s) during a heart attack is a referred pain. Referred pain is when you experience in one part of your body when the problem is really in another part of your body. Good examples of this would be how some people who have an appendicitis will complain of pain in their right shoulder.

Related Questions

I'm female having dizzy almost 10 month, heart fast, tingling arm and leg, neck pain and head?

Likely ansiety. Any symptoms that has lasted this long should be evaluated in person by your physician. Check thyroid, hormones, electrolytes, your iron specially if you have heavy menses, your B12 level and rule out mitral valve prolapse. Then if normal, cut out any alcohol and caffeine in your diet and stay well hydrated. If dizziness means room spinning, then you need to see an ent. Read more...