Hypercalcaemia is a condition where there is too much calcium in the blood. It may cause abdominal pain, nausea and vomiting, constipation, loss of appetite, excessive thirst, excessive urination, tiredness, weakness, weight loss, depression, dehydration, bone fractures, or kidney stones. Treatment options for hypercalcaemia include intravenous medication, surgery, replacing fluids, and supportive care.