Right upper ureteral stone with mild hydronephrosis of the right kidney can lead to severe pain in the lower back and abdomen, which can be accompanied by nausea, vomiting, blood in the urine and other symptoms, and the treatment needs to be chosen according to the size of the stone. Right ureteral stone with right hydronephrosis is caused by right ureteral stone, most of the ureteral stone is caused by kidney stone dislodged to ureter, which can lead to severe pain in the lower back and abdomen, accompanied by nausea, vomiting, sweating, frequent urination, blood in urine and other symptoms, and the obstruction of the stone can lead to fluid retention in the kidneys. Mild fluid buildup indicates that the stone is not big, and the stone diameter is below 4mm which can be discharged by drinking more water and exercising more. If the stone diameter is 4mm~6mm, you can consider medication to remove the stone, such as Nephrolithon, stone removing granules, etc. The medication should be used under doctor’s guidance. Ureteral stones with a diameter of 6mm~1cm can be considered for extracorporeal lithotripsy, and those with a diameter of more than 1cm can be considered for surgical lithotripsy.