Hypoparathyroidism is a rare condition where the parathyroid glands produce insufficient amounts of parathyroid hormone (PTH). This hormone is crucial for regulating the levels of calcium and phosphorus in the body. When PTH levels are low, it can lead to low calcium levels, causing symptoms like muscle cramps, tingling sensations, and even seizures. The condition can be caused by various factors, including surgery that removes the parathyroid glands, autoimmune disorders, or genetic factors. Treatment typically involves taking calcium and vitamin D supplements to help manage symptoms and maintain normal calcium levels in the body.