Hypercalcemia is a condition in which the calcium level in your blood is above normal. Too much calcium in your blood can weaken your bones, create kidney stones, and interfere with how your heart and brain work.
Hypercalcemia is usually a result of overactive parathyroid glands. These four tiny glands are situated behind the thyroid gland. Other causes of hypercalcemia include cancer, certain other medical disorders, some medications, and taking too much of calcium and vitamin D supplements.
- Kidneys. Excess calcium in your blood means your kidneys have to work harder to filter it. This can cause excessive thirst and frequent urination.
- Digestive system. Hypercalcemia can cause stomach upset, nausea, vomiting and constipation
- Bones and muscles. In most cases, the excess calcium in your blood was leached from your bones, which weakens them. This can cause bone pain, muscle weakness and depression.
- Brain. Hypercalcemia can interfere with the way your brain works, resulting in confusion, lethargy and fatigue. It can also cause depression.
- Heart. Rarely, severe hypercalcemia can interfere with your heart function, causing palpitations and fainting, indications of cardiac arrhythmia, and other heart problems.