Tetany is caused due to the hyposecretion of parathyroid hormone (PTH). Due to hyposecretion of PTH serum calcium level decreases (Hypocalcemia), as a result, serum phosphate level increases. Calcium and phosphate excretion levels decrease. Generalized convulsion, locking of jaws increased heartbeat rate, increased body temperature, muscular spasm are the major symptoms of tetany.
