What Causes Constant Headache Radiating From Back Of Neck To Left Eye?
Probably Occipital Neuralgia,
Detailed Answer:
Hi, I had gone through your question and understand your concerns.
You had numerous imaging studies of head and brain that didn't help diagnose your concern.
First diagnosis I think it's related to your symptoms is Occipital Neuralgia a condition where the occipital ( C2) nerves ( greater and lesser) are compressed or damaged along the way.
These nerves supply back of the neck and top of the head and damage from trauma, neurovascular conflict, upper neck lesions or masses etc. results in similar symptoms to yours.
Treatment of this condition has several components. Conservative treatment consists on NSAID drugs, acupuncture, physical therapy, antidepressive drugs, opioid analgesics, anticonvulsant drugs, nerve block, nerve stimulation etc.
Surgical treatment consists on neurolysis ( cutting of nerve) or decompression of nerve.
Another diagnosis to consider in your case is Tension Headache.
So I suggest you to consult your Neurologist and discuss above mentioned possibilities.
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.