Paresthesia (pins and needles)
This is a feeling of pins and needles or numbness. Many people with hypocalcemia report paresthesia around their lips and mouth, as well as their hands and feet. It can also be felt throughout the body, including up and down the legs and arms, the back, and the head. Often paresthesia is an early sign of calcium deficiency.
Tetany (muscle spasms and cramps)
Tetany has been described by hypoparathyroidism patients as “a charley horse on steroids.” This is when the muscles begin to seize or cramp up, causing extreme pain and the inability to relax. Tetany is often felt in the hands and feet but can occur in any part of the body. Severe tetany can involve spasms in the voice box (laryngospasm), making it difficult to breathe, and can also cause seizures or cardiac arrest.
Muscle and Bone pain
Less severe than tetany, hypocalcemia can cause aching throughout the muscles and deeper into the bones.