I too have ON. Mine came with a whiplash injury and cervical fusion of 3 levels. After the fusion, my ON headaches have been constant on my left side of my neck....relentless....never ceasing. Currently, I numb my pain mostly with morphine. I will be trying a Occipital nerve block in 2 weeks. Have you had any procedures? I have had epidurals, trigger pt. facet joint inj. to no avail....I only numb my pain...and thank God the drugs still work. I would love to chat someday....
God bless you. I am 54. How old are you? I have had Headaches since my daughter was born,...18 yrs. but severe for 7 yrs.

Beth