Parathyroid and kidney stones: what is the connection?

The parathyroid glands help regulate calcium in the blood. If one or more glands release too much parathyroid hormone, the body may move more calcium into the bloodstream. Extra calcium can pass into urine and combine with other substances to form stones. This does not mean every kidney stone is caused by a parathyroid disorder.

Possible clues include repeated stones, high calcium on a blood test, bone thinning, thirst, constipation, or tiredness, although symptoms vary. Dehydration can also make urine more concentrated and encourage stone formation.

Book a GP consultation if you have recurring stones or have been told your calcium is high. Assessment may include blood tests for calcium and parathyroid hormone, kidney function checks, and urine testing. An abdominal ultrasound can help look for a stone or urinary blockage, while other imaging may be considered when needed.

Follow the fluid and treatment advice given for your situation. Do not begin high-dose calcium or vitamin supplements without clinical advice. Keep a record of stone episodes, medicines, supplements, and family history, because these details can help identify a pattern.

Seek urgent care for severe flank or abdominal pain, fever with urinary symptoms, repeated vomiting, difficulty passing urine, or blood in the urine. A blocked urinary tract with infection needs prompt treatment. Contact a clinician quickly if pain is escalating or you cannot maintain fluids.

Ask whether calcium and parathyroid hormone should be checked, what your kidney function shows, whether a stone is blocking urine flow, and how to reduce recurrence risk. Also ask whether any medicine or supplement could affect calcium or urine chemistry.