I have severe neck pain and the back of my head is also in pain more on the right side than the left. swollen glands constant feeling of pressure?

Muscle spasm: Sounds like your neck muscles that extend up into your scalp are irritated. This may have been triggered when the lymph nodes rapidly enlarged. Why is another question - they respond to perceived threats to your body like infection. Moist heat, mild stretching and some ibuprofen might help. Massages good too. If continues or worsens see your MD. http://www.webmd.com/pain-management/guide/neck-shoulder