R29: Other symptoms and signs involving the nervous and musculoskeletal systems

R29.0: Tetany

Nerves and muscles consist of cells. For cells to be able to function normally, the right conditions must exist in the body. For example, the right amount of calcium needs to be present. If the conditions do not suit the cells, the cells can react abnormally. This can cause various problems.

If nerve cells are affected, there may be an unpleasant tingling sensation or pain in the skin. If the muscle cells react abnormally, the muscles affected may contract and cramp up. These cramps can be painful. The cramps typically occur in the hands and feet. You may also feel listless.