I just read this informative article by Dr. Jason Hall: https://migraine.com/blog/migraine-choosing-surgical-nerve-decompression-candidates/
In it, he describes a surgery called Arterial Ligation, which is rarely performed in the United States. It may help headache patients whose pain is relieved by pressing on their head and then the pain comes back when the pressure is released. The pain is also relieved by wearing a band around the head. Both of these criteria fit my son's condition exactly.
Has anyone had this surgery?
A Google search did not help me find any doctors who perform this surgery other than Dr. Hall in Houston and a clinic in South Africa. We are in the Washington DC area and would like to find a practitioner we can drive to. I will call Dr. Ducic to see if he does it, but his website does not mention it.