What are the pros and cons of gallbladder removal surgery?

Depends on why. The reason to remove the gallbladder is most often biliary colic, due to gallstones, causing pain and nausea. Untreated, this will not resolve and is also associated with other risks, such as pancreatitis. On the down side, while many patients have no or resolved GI symptoms after cholecystectomy, some patients may note changes in bowel habits with more frequent stools and irritation.