Skip to main content
What is it? High level of calcium in the blood
What causes it?
  • Cancer in the bone:
    • increase in the amount of calcium absorbed into the blood from the bones
    • inability of the kidneys to get rid of the excess calcium
Symptoms
  • Increased urination
  • Excessive thirst
  • Dehydration
  • Vomiting
  • Constipation
  • Muscle weakness
  • Drowsiness
  • Confusion
How to treat
  • Fluids to treat the dehydration
  • Treatment with drugs called bisphosphonates to stop damage to the bone
  • A change in hormonal therapy or chemotherapy
Last updated 20 October 2020
This content is over 2 years old and may contain information that is no longer applicable.
Cancer Australia

Cancer Australia was established by the Australian Government in 2006 to benefit all Australians affected by cancer, and their families and carers. Cancer Australia aims to reduce the impact of cancer, address disparities and improve outcomes for people affected by cancer by leading and coordinating national, evidence-based interventions across the continuum of care.

If you would like an interpreter to help you understand any information on this website, please call TIS National on 131 450 and ask them to call Cancer Australia on 02 9357 9400. Our business hours are 9am to 5pm, Monday to Friday.

© 2025 Cancer Australia. All rights reserved.