As a eNT surgeon I can guide you through this that u might have mastoiditis is there any redness in the mastoid area, any history of ear discharge or heaviness in ear or any heaviness in head .
Other reason r cervical sprain, Thorat infection leading to localised lymphadenopathy and pain.
Kindly share a picture of mastoid area along with complete history acute mastoiditis is not a good thing
Next Steps
Feel free to consult with detail history for further guidance and prescription