Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
and neck pain
do not suggest that it can be tumor
. Infact viral fevers will also cause headache and neck pains. It might not be a tumor. You should first get the fever treated and should be concerned if the headache still persists.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
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Wish you good health,
Dr. Srikanth Reddy M.D.