A gallbladder stone measuring 24 mm is considered large, and in most cases, doctors recommend surgical removal of the gallbladder (laparoscopic cholecystectomy) if you have symptoms like pain, nausea, or repeated attacks, because large stones are unlikely to dissolve with medicines and may lead to complications such as infection or blockage. Non-surgical options like medicines (e.g., Ursodeoxycholic acid) are usually only helpful for small cholesterol stones and take a long time with limited success, and procedures like shock wave therapy are rarely used and not widely effective. If you do not have any symptoms, your doctor may advise monitoring, but many patients eventually need surgery. The operation is commonly done by a minimally invasive (keyhole) method and is generally safe with good recovery. It is best to consult a surgeon to decide the right approach based on your symptoms and overall health.