Low blood calcium, leading to vomiting and uncontrollable twitching of muscles if severe; may be due to underactivity of the parathyroid gland, kidney failure, or vitamin D deficiency.
An unusually low amount of calcium in the blood, which can cause tetany.
A serum concentration of calcium below the normal range (between 2.33 and 3.05 mmol of calcium per 100 ml of serum). Acutely this may cause tetany; chronically it may give rise to rickets, osteomalacia or osteoporosis. It may be caused by hypoparathyroidism, vitamin D deficiency, malabsorption, renal failure or acute pancreatitis.
Hypocalcemia refers to an unusually low concentration of calcium in the blood. The condition is often caused by a deficiency in vitamin D. However, less common factors such as chronic kidney failure or hypoparathyroidism, a condition where the parathyroid glands are underactive, can also lead to hypocalcemia.
Hypocalcaemia, or low calcium levels in the blood, may not produce any symptoms when it is mild. However, when it is severe, it can cause tetany, a condition characterized by painful muscle spasms and twitches, particularly in the hands and feet. Furthermore, it can lead to bone softening, resulting in diseases such as rickets in children and osteomalacia in adults.