Some thoughts: cannot say in your particular case, but generally, infection and / or inflammation would be causes of warmth. THis can be due to a skin infection, collar rubbing, reaction to something on neck (detergent, jewelry). It can also be a reaction by the local nerves but this is not at all common.
Answered 5/22/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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