Hi pain near beginning of lower part of neck & upper back in one spot. It aches. Ears are stuffy, neck tense. Why the neck ache?

Viral infection? Muscle aches (myalgia) may be a symptom of a viral infection, such as the flu. Try aspirin or motrin if you are not allergic to them, rest, and drink plenty of fluids to avoid dehydration. If not improving within a week see doctor.