Welcome to Healing Well.
Do you have head pain with the pressure and dizziness? If the internal medical specialist doesn't work you may ask to be referred to a neurologist, possibly one who specializes in headaches.
I experience the feeling of pressure from my blood vessels dilating, a migraine. My neurologist helps me.
Good luck with your doctor this week. Keep us up to date on your progress.
Co-moderator Migraine Forum
"In life you can never be too kind or too fair; everyone you meet is carrying a heavy load. When you go through your day expressing kindness and courtesy to all you meet, you leave behind a feeling of warmth and good cheer, and you help alleviate the burdens everyone is struggling with." -- Brian Tracy