Depending on the size and number of stones, gallstones after gastrectomy can be treated by observation therapy or surgery. 1. Observation treatment: For patients with single gallstones with a diameter of less than 2 centimeters, observation treatment can be carried out, paying attention to drinking plenty of water, appropriate exercise, regular review of abdominal ultrasound, and review of abdominal ultrasound every 3-6 months, to observe changes in the diameter of gallstones. 2. Surgical treatment: (1) For patients with multiple gallstones, regardless of the volume of gallstones, patients need to undergo surgical treatment. Repeated stimulation of the gallbladder wall by multiple gallstones is prone to gallbladder cancer, which endangers the patient’s life. (2) For single gallbladder stones with a diameter of more than 2 centimeters, it is recommended to remove the gallbladder, because gallstones with a diameter of more than 2 centimeters have the risk of becoming cancerous. Therefore, if you suffer from gallstones, you need to go to the hospital to see the diameter and number of gallstones, and according to the examination results, you should actively cooperate with the doctor for treatment, and do not be careless so as not to delay the treatment.