A female patient, suffering from cystitis, developed a high fever and right-sided kidney pain. Lachesis was prescribed on the basis that for the last four days the chills lasted from 2 to 3 pm and that the kidneys were extremely sensitive to touch. Her symptoms changed, but she did not improve so Lycopodium was prescribed. This produced a slight improvement but her fever was still high so Bryonia was prescribed. This produced another change in symptoms (without much improvement) which then clearly indicated Chelidonium. This brought her temperature down and reduced her kidney pain. Ultrasound showed an abscess in right kidney at this time, which disappeared after another 3 days without further treatment, and the patient continued to improve. It is interesting to note that the patient's emotional and mental state improved through the disease, providing the strength to solve long standing problems. The author wonders whether it was necessary to prescribe all the different remedies (which are well known to be complementary) in sequence in this case, or if Chelidonium was the right remedy from the beginning.