Hi, I've been experiencing severe blood pressure spikes myself - although I'm much older at 59 yrs. I have been researching this because 2 years ago, I landed in the hospital because, despite many medications and medication changes, my BP kept spiking throughout the day. I couldn't do anything other than wait for the next episode to happen.
What I've landed on is Baroreflex failure for me. It describes exactly what happened to me in the beginning (nearly 2 years ago now), and what keeps happening, although the more severe BP spikes are now controlled with hypertension meds (several) and clonidine as a rescue med.
There are quite a few other things to consider, but since no one has suggested you look into Baroreflex failure (it doesn't have to be total failure), I thought I'd mention it, because I started out just having BP spikes that quickly got out of control, and happened throughout the day.
I hope this information helps you either rule this out, or rule it in.
don't know but I know if you google differential diagnosis you can perhaps find some material. Here's an extract I've copied out from Churchill's differential diagnosis:
underlying cause found in less than 10% of essentialy hypertensive patients.
renal parenchymal diseases e.g. glomerulonephritis
stenosis of renal artery
polycystic kidney disease
connective tissue disease (esp. systemic sclerosis)
oestrogen-containing oral contraceptives
glucocorticoids - corticosteroids
monoamine oxidase inhibitors and tyramine
coarctation of the aorta
I don't know if you have thus far but obviously, you need a medical evaluation. You are checking your bp to know it gets up to 210/110? You're awful young to have bp concerns but it can happen. Do you have panic attacks by any chance? Your adrenal system and your hormonal system can be responsible for things like what you describe. Is there any update?