Kidney stones, also called urolithiasis, occur due to the formation of solid materials in the urinary tract. Stones are formed when minerals in urine are of high concentration. Small stones pass out in the urine, but larger stones can cause blockage in the ureter causing severe pain in the lower back or abdomen. Other symptoms include blood in the urine, vomiting, nausea, sweating, and/or painful urination. There is an obstruction to the flow of urine in this condition. So, dehydration may occur as a result of drinking less water to avoid discomfort. There can be a combination of many factors like genetics and environment.
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