Coccydynia is often caused by an injury, but it may occur seemingly spontaneously. There are many causes of tailbone pain that can mimic coccydynia, including sciatica, infection (including shingles of the buttocks), pilonidal cysts, sacroiliitis, and fractured bone (broken tailbone or tailbone fracture).
Characteristics: Curium is a hard, dense radioactive silvery-white metal. It tarnishes slowly in dry air at room temperature. Most compounds of trivalent curium are slightly yellow in color. Curium is highly radioactive and it glows red in the dark.
Cesium. Cesium (Cs) is a waxy, silvery-gold metallic element that is the softest of all metals. Cesium is one of three metals (gallium and mercury) that are liquid at or near room temperature. Cesium is a very reactive metal, that when mixed with cold water, produces an explosive reaction. Its melting point is so low that it will melt if it is held in the hand.