Kidney stones are hard, solid particles that form in the urinary tract. the stones may be small or large. If the stone is small, it can pass out of the body very easily without any problems. However, if a stone is large, it blocks the flow of urine, and also causes pain.Hence medical treatment is required. since medical treatment itself causing side effects,so now a days treatment is focused on natural treatment. In this work spirulina is taken and its effects are analysed. This work is especially for kidney stone patients.