The medical term, NOT the film or commonly accepted but incorrect association with the fear of heights.
A family member felt unwell, he's living in Spain currently. Had been playing golf, and then jogging, gently, for fear of a repercussion of the symptoms, which keep re occurring, and did so again. Activity seems to bring it on. Jogging, walking etc
Dizzyness and disorientation
Nausea
Sweating
Came close to passing out
Felt weak during, and after for some considerable time.
It then passed. Only to reoccur to a lesser degree several hours later, with slowly increasing intensity, while driving home. Happened to see a Hospital sign and pulled in.
After being put on a drip of some sort unknown, and a pill of some sort unknown, after a half hour he felt ok, and the Dr said "you have Vertigo"

but the Dr had averted what was heading for a similarly serious episode.
Googling suggests if it (Vertigo) occurs while upright its more likely to be caused by a part of the brain rather than the normal inner ear abnormality. Bit as we know the internet is always wrong, and most medical conditions always bring up the same phone book of symptoms, mostly similar to those described.
Sounds serious, or is it? Is it even Vertigo.
There are also recurring instances after a food poisoning episode (campylobacter) several years ago, of upset stomach and nausea to varying degrees. He's never been right since.
Needless to say the usual medical channels are being followed. But in the mean time, I know there's a member or two with medical knowledge on here, so any thoughts?
Ta