Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice Urinary leak may have many causes, the one you said that there is leakage with cough or sneeze, is called stress incontinence this is because of weakening of the pelvic muscles and is common with advanced age. It can be helped by pelvic floor exercises. However, this must be confirmed and other causes should be ruled out. You must see urologist in this regards. I personally would have advise a uro-dynamic studies that would exactly dig out the cause. Stones seems to be not relevant here though they can some times cause infection that may contribute. Hope I have answered your query. Let me know if I can assist you further.