In medicine (endocrinology), hypoparathyroidism is decreased function of the parathyroid glands, leading to decreased levels of parathyroid hormone (PTH). The consequence, hypocalcaemia, is a serious medical condition. Signs and symptoms Tingling lips, fingers, and toes Muscle cramps Pain in the face, legs, and feet Abdominal pain Dry hair Brittle nails Dry, scaly skin CataractsWeakened tooth enamel (in children) Muscle spasms called tetany (can lead to spasms of the larynx, causing breathing d… (More on Hypoparathyroidism)