A high level of calcium in the blood is hypercalcemia. Calcium is an important mineral that is in almost every part of your body. It makes your teeth and bones strong and healthy. It also helps your body: Make blood clots Keep your heartbeat normal Release hormones Send and get signals between your nerves and brain Make muscles work well Certain health problems can keep the calcium from being absorbed out of the blood. This can make your blood have a higher level of calcium. These are problems like: Trouble with your thyroid, parathyroid, or adrenal glands Certain drugs or diet aids Kidney failure or cancer Infections or inflammatory diseases Being confined to bed for a long time People who have high blood calcium may have some signs or they may have none at all. You may notice: Muscle weakness and twitching Being very tired Not able to have bowel movements Low mood Upset stomach and throwing up Your doctor will work to treat any hidden cause. You may need to have fluids, be given special drugs, or dialysis to help get rid of the calcium in your blood. You may be in the hospital until your levels are back to normal.