Hyperparathyroidism leading to hypercalcaemia is a rare cause of acute pancreatitis with debatable association. The diagnosis of hyperparathyroidism is frequently overlooked or delayed as symptoms are non-specific and serum calcium is not routinely measured in acute pancreatitis. Early diagnosis and treatment of hyperparathyroidism may reduce the chances of complications. We report a 35-year-old woman, who was admitted with recurrent episodes of acute pancreatitis. She was previously diagnosed with gall-stone induced acute pancreatitis, had undergone laparoscopic cholecystectomy, but the recurrence of acute pancreatitis suggested an alternative aetiology and provoked extensive investigations. Serum calcium was found to be elevated. No additional risk factor for pancreatitis was found. Further workup revealed primary hyperparathyroidism, which was due to a functioning parathyroid adenoma. She has undergone parathyroidectomy followed by an uneventful recovery. She subsequently conceived and is now in her first trimester, without any recurrence of acute pancreatitis since her surgery.