A lot of people have them and they are so small they can pass without pain. My late DH had them. His were large and wouldn't flush even with all of the water he drank. He ended up having a stint put in to ease the pain that he suffered from. They had to be really careful with prescribing anything because of all of his other problems. He drank cranberry juice and cherry juice(due to gout), but it didn't help him.