I'm not that active on this board lately, but happened to visit today.
I wish I could give you a definite solution for head pressure, but I probably stumbled into mine.
For about 5 years, I was getting head pressure every couple months, sometimes lasting weeks. Around that time, I also started to get migraines.
Roughly a year ago, or a bit more, I started using the following daily:
Agmatine 250mg 2x daily, Tianeptine Sulphate 25mg 2x daily.
I'm fairly confident that the Tianeptine stopped my migranes as one week when I decided to stop using it, they came back.
I have also been using CBD products for about 6 months -- vaporized CBD took away the migranes almost instantly the days I was getting them when I stopped the Tianeptine.
I also now take D3, Fish Oil, Uridine Monophosphate, Alpha GPC Choline, and Co-Q10 daily.
In addition, I've been more careful with my head position and have been gently stretching my neck more often.
Further, as noted, I've cut out a lot of food dyes. Since I greatly reduced my opioid use, I've not had a sweet tooth and so far less sugar and the artificial crap in typical candies.
C4-T4 Scoliosis (disk degeneration, stenosis, narrowed neuroforamen, bone spurs), RT hip and SI joint damage from car accident in 2004. Also, supraventricular tacycardia and mitral valve prolapse.
Time Release: Tramadol ER 300mg. Verapamil 240mg SR (for tachycardia).