There is no scientific data to assess how long it takes for a 7mm stone to fall out. Because stones larger than 5mm are generally very unlikely to fall out on their own. 7mm stones, we cannot rule out the possibility that someone with superb stone removal ability, drinking a lot of water and exercising a lot, may fall out on their own within a week, and the vast majority may need to have the stones broken up with the help of extracorporeal shock wave lithotripsy and then expelled from the body. Most of the stones are expected to be expelled within a week after the lithotripsy. After lithotripsy, we encourage you to drink more than 2000ml of water per day, walk properly, and take lithotriptic and anti-inflammatory medications, and most of the stones can be expelled through these comprehensive treatments. It is recommended to collect the excreted stones for stone composition analysis, so that effective preventive measures can be taken.