Kidney stones are a very common health problem. They form from the chemicals in urine, such as uric acid, phosphorous, calcium and oxalic acid. Other common causes of kidney stones are excessive consumption of vitamin D, a mineral imbalance, dehydration, gout and an improper diet.Irrespective of the size of the kidney stones, they can cause severe pain. Other symptoms include a desire to urinate frequently, painful urination, nausea, vomiting and excessive sweating.In addition to conventional medications, a majority of cases can be treated with the help of natural ingredients as well. Many of them also will help prevent stones from developing in the future.The combination of lemon juice and olive oil is traditionally used as a home remedy to expel gallbladder stones but it can also be used to treat kidney stones. The citric acid present in lemons helps break down calcium-based kidney stones and stops further growth.