How does a kidney stone form?

Depends on the Type!: There are many types of stones & the cause of the stone depend on the type of stone. In women, struvite stones are caused by urinary tract infections.Calcium stones, the most common occur for a variety of reasons. Usually calcium combines with substances such as oxalate, found in foods such as spinach. Uric acid stones form in people with gout. Use a strainer to catch & determine the type to treat.