A 35 year old married Hindu female patient presented to the casualty with the chief complaints of recurrent episodes of vomiting for 3 weeks, pain abdomen, and involuntary spasms in both hands for 1 week. On examination mild epigastric tenderness was present, and Chvostek's and Trousseau's sign were present. On investigation USG abdomen showed cystitis. Serum calcium 6.9mg/dl and corrected calcium was 7.5mg/dl, Na+ 115.4meq, k+ 1.43meq, S. PO4- 7.6mg and serum creatinine was within normal limits. ECG showed u waves in chest leads. CT brain was normal. On subsequent examination serum sodium and potassium improved but serum calcium again decreased to 7.6. And during the whole course of treatment patient showed only intermittent improvement. Serum PTH was planned and it was very low i.e.0.3 pg/ml (15-68). Patient's thyroid function was within normal limit. In view of laboratory values showing severe hypocalcemia, hypoparathyroidism, and hyperphosphatemia, we considered the possibility of hypocalcemia secondary to idiopathic hypoparathyroidism. Patient was treated with high dose intravenous calcium (Calcium Gluconate) and Vitamin D (Calcitriol) in addition to receiving all supportive treatments. Intake of milk and milk products was restricted in view of hyperphosphatemia. She responded to above treatment and was