Hello, Inflammation can cause swelling and pressure. Infections, undiagnosed, can travel and change with signs of inflammation causing pain symptoms. Infections can flare up and calm down. Rule out some typical infections such as a dental abscess, wisdom teeth, grinding your teeth, TMJ, ear or sinus complications. Visit your dentist and make sure that you are up to date on your dental health. Have you had any history of trauma? Neck and spine stress can general an inflammatory reaction. Pain can be due to pressure on a nerve area.Can you relate this discomfort to any form of exercise or activity? Do you get relief from medication such as Advil or Tylenol? You should consider having a physical with basic blood lab work. This will check your systemic functions and help determine if additional testing should be considered. Your symptoms could be related to a number of causes. I hope you find this helpful and thank you for your inquiry.