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Cyclic Vomiting Syndrome: It’s Invisible, Not Imaginary If you’ve ever dealt with relentless nausea and vomiting, but every test comes back normal, you might have Cyclic Vomiting Syndrome (CVS). CVS isn’t just another stomach bug—it’s a neurologically driven disorder that starts in the brain, not the gut. Think of it like a migraine, but instead of head pain, your body responds with repeated waves of nausea and vomiting. It can be debilitating, unpredictable, and dismissed too often—but it’s not