This could be vertigo. It could be inner ear related, or not. It has happened to me several times over the years, and I have had several falls, so be VERY careful going down stairs and in the shower. Mine was not inner ear related. It always seems to occur when my body is overloaded with a production of lymph. (ANYONE else have that fun little problem as well???) It was definitely more severe and prolonged in the first 3 or 4 years.

Many normal people get inner ear related vertigo. It takes about an hour to be tested by a specialist. My ear, nose and throat doc set it up for me, and the test didn't have any worrisome components regarding flaring my RSD.

You DID just start the low dose Naltrexone, and you seem to frequently have bad reactions/side effects to most meds, correct? It could be that as well.

One last thought, I'm very hypersensitive to light and noise (and vibrations of course.) So much so, that I get headaches and my pain increases when I watch tv--especially the commercials themselves. And I couldn't be anywhere near my son when he'd play video games. I'm not sure how rare this component of RSD is, but I did research after a few docs looked at me oddly and found that I wasn't the only one (or crazy)... For me this developed after I had a Radio Frequency Neurotomy. I find the less stimulating my environment, the better I feel. When I flare, I turn off my lights, put on soothing instrumental music, and take a warm bath with Epsom Salts, thus removing as much external stimuli as possible. And I spend much of my time reading my Nook so that I don't start to flare... Even the little external flashing lights on my laptop bother me, so it takes very little to set me off. This is why I limit my exposure in public as much as possible, as well.