Men with pain on the left side of the belly button must be aware of whether it is caused by ureteral stones. In this case, it is recommended to have an ultrasound examination of the kidneys, ureter and bladder, routine urine examination and, if necessary, a CT examination of the kidneys, ureter and bladder. The examination can determine whether there are stones in the kidneys and ureters and whether there is fluid in the kidneys. If there are stones, a decision should be made about how to treat them based on their size. For small stones, such as those less than 0.5cm in diameter, it is recommended that you drink more water, urinate more and take lithotripsy medication, which can promote the expulsion of stones from the body. If the stone is larger than 0.5cm, extracorporeal shock wave lithotripsy can be considered to break up the stone and expel it from the body, while larger stones may require surgical treatment.