7mm stones are generally difficult to discharge by increasing water intake and other conventional ways, usually need extracorporeal shock wave lithotripsy for discharge, after shock wave lithotripsy is better discharge.
Kidney stones are mainly due to the formation of some components in the urine in the kidneys, which will lead to a series of urinary symptoms, in the treatment of 5mm for the smaller kidney stones, the surface is smooth and the lower end of the stone urinary tract is not obstructed, you can increase the exercise, take medication, increase the water consumption and other ways to promote its natural discharge.
While 7mm is between 5mm and 2cm, this case needs to be discharged through extracorporeal shock wave lithotripsy to break up the stone.
Extracorporeal Shock Wave Lithotripsy is generally suitable for 5~20mm renal pelvis and middle and upper calyces stones, but some people, such as pregnant women, distal urethral stenosis, coagulation dysfunction, renal failure, acute urinary tract infection, and serious cardiac arrhythmia or stone size is too large, are not suitable for Extracorporeal Shock Wave Lithotripsy.
You need to consult your doctor to evaluate your own situation to choose the specific treatment.