Why does a severely redundant loopy distended colon spasm and cause nausea? is surgery an option?

Unclear why: I do not think there is a known connection between such symptoms and a redundant colon. I assume you presented to a GI doctor with symptoms and he/she performed a colonoscopy or ct scan which showed a redundant colon. It's hard to prove causality. Surgery is a serious procedure with risks. Decision to have surgery requires weighing risks and benefits. Consult your doctor or a surgeon To discuss

Depends on function: The therapeutic approach depends on colon function. An elongated colon may work perfectly well, & therefore require no "treatment." a sluggish colon may respond to prokinetics (designed to speed up movement of material through colon). Colonic inertia that is refractory to prokinetic rx may benefit from "colon reduction" surgery. Sitz marker testing, defecography, anal manometry studies can help.