Hi.
You are experiencing a burning sensation over the head, scalp, along the neck and the arms. This is not associated with any visible rash. Also, you have noted hiccups and some heartburn. At this point, we can not exactly tell what this is but hiccups and heartburns would need further evaluation. I suggest you seek consult with an internist for a complete physical examination. This burning sensation may be nerve related as it follows a particular pattern. A complete medical history, neurologic examination and blood tests will help rule out other conditions .Evaluation of cardiac function may be necessary.
At this point, underlying conditions have to be ruled out first before a localized skin condition is given as a diagnosis.
Is there a strong family history of allergies in the family?
bump... plus it has started to be irritated on my shoulders... and the part of my palm under my thumb if that makes sense...