question: Hallo sir, MY fathers age is 56 years, he has recently undergone a ultrasound test where its was diagnosed that he is having 2 gallstones 8mm size. He has 4 years ago , undergone an heart surgery . recently he has been complaining about leg pains and also abdominal pain frequently, I would like to know whether gallstones are dangerous and whether he has to undergo surgery? Please do provide your valuable solutions