Hyperacidity and acid reflux, particularly when accompanied by intense sour belching, regurgitation of acid, and burning in the stomach or oesophagus. it is especially suited to individuals who suffer from gastric disturbances at night, often disturbing sleep, and in children with sour-smelling vomit or stools. the remedy is also useful in headaches that result from digestive troubles, especially when the headache is located in the forehead or temples.