A pheo- or tumor on the adrenal glands or ANY tumor such as carcinoid or endocrine system related can cause facial flushing if hormones are released. Check out www.carcinoid.org and it will provide links as well as information on the symtoms you describe, as well as other causes.
Good luck! I care.
I had the same symptoms for 25 years. I also had muscle tension all over, was jumpy and had lots of anxiety, my heart would race and pound, I would have lots of headaches, I had trouble getting good sleep, and I was generally weak and shaky. It would get worse when I bent over or leaned forward.
A cardiologist happened to recognize my symptoms -- a "pheo" or pheochromocytoma. It's usually a benign tumor in the adrenal gland, or in the abdomen somewhere, that secretes adrenaline. (Leaning forward was putting pressure on it.)
It's important to know that if you have this, having surgery, anesthesia or severe pain will cause your bloodpressure to go dangerously high. Doctors need to know this before they make decisions involving surgery, and it may take several blood pressure medications to keep it down.
A nephrologist (kidney doctor) or endocrinologist with experience with pheos can run some simple blood tests called "fractionated metanephrines" and "fractionated catecholamines" to see if you have elevated adrenaline. (They should run both.) If you do, they should do an MRI or CT scan to find the location of the pheo. Then it's usually surgery to have it removed.
Clonodine (a beta blocker) is a common blood pressure medication that gave me some relief -- my heart didn't feel like it was racing so much.
There's plenty of good info about pheos on the web, including www.medlineplus.gov and www.uptodate.com (it costs $20 for a subscription but you can't beat the info).
Hope this helps... Please let me know what you find out.
Ellen
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