Hi Sajid. Multiple calculi in gall bladder needs operation to remove the gall bladder with calculi, as there is already inflamed wall with probe tenderness. The possible dangers are - complications of general anesthesia as difficulty in getting out of anesthesia , bleeding during surgery, damage to nearby structures. Now-a-days this surgery is performed by laparoscopy or a small hole surgery. Before surgery i would advice to get all blood tests, Liver function tests, ECG , X-ray chest and opinion of he physician or an anesthetist as to the fitness for anesthesia and surgery. If he turns out to be fit , go ahead with surgery. The complication rates are very very low with the advent of new techniques of surgery and anesthesia.