Originally Posted by _mystictiger_
Hiya and thank you for your reply. Yup she is currently taking calcium tablets which also contain Vitamin D. What causes low calcium? We've never had this in our family before so we're a bit concerned. I called her GP earlier but there isn't any appointments until next week. I'll try again tomorrow tho, hopefully there is a cancellation.
There are a bunch of possible causes - in general poor intake or absorption, increased loss, parathyroid problems, etc., etc.. Your docs are the ones to answer that question. Be patient, its unlikely anything is going to happen suddenly.