You might not have signs or symptoms if your hypercalcemia is mild. More-severe cases produce signs and symptoms related to the parts of your body affected by the high calcium levels in your blood. Examples include:  Kidneys. Excess calcium makes your kidneys 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 and muscle weakness. Brain. Hypercalcemia can interfere with how 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. 
signs symptoms hypercalcemia mild  more-severe cases produce signs symptoms parts body affected high calcium levels blood  examples include:  kidneys  excess calcium makes kidneys work harder filter it  can cause excessive thirst frequent urination  digestive system  hypercalcemia can cause stomach upset  nausea  vomiting constipation  bones muscles  cases  excess calcium blood leached bones  weakens them  can cause bone pain muscle weakness  brain  hypercalcemia can interfere brain works  resulting confusion  lethargy fatigue  can cause depression  heart  rarely  severe hypercalcemia can interfere heart function  causing palpitations fainting  indications cardiac arrhythmia  heart problems
hypercalcemia