(speaking from personal experience) the absolute worst disorder to ever have. lots of nausea, vomiting, dry heaving, hypersensitivity to light & sound, etc. during an episode. the only medication to stop an episode is Ativan. it's lesser known so doctors have a difficult time diagnosing. episodes can be triggered by almost anything, and triggers are different for everyone (hormones, anxiety, excitement, changing of seasons, certain smells or times of day, etc.). be prepared for lots of IVs and ER visits. also referred to as simply CVS. sometimes retching or heaving too aggressively can lead to tearing a hole in the lung and getting air trapped under the skin (also happened to me).
I had a cyclic vomiting syndrome episode last Friday and spent most of it in the ER.

Dude, I absolutely hate my stomach, this cyclic vomiting syndrome sucks.
by kepicket April 28, 2020
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