BM 124 Renal Calculi is a homeopathic remedy designed to ease the symptoms associated with kidney stones such as gravel in the kidney, sharp pain across the back, reddish and grey urine with epithelial cells and amorphous waste matter, frequent urination, and painful urination. It also helps to relieve pain in the sacral region, nausea, vomiting, spasm-like pain, and radiating pain in the lower inflank, pelvis, groin, and genitals.