This is when your parathyroid glands make too much of a hormone called PTH that can make your body take calcium from your bones. That can cause osteoporosis. This can happen for several reasons, including:
- A non-cancerous growth on one of the glands
- Two or more glands get too big
- A cancerous tumor (this is rare)
- Not enough vitamin D
- Kidney failure
- Problems absorbing calcium