Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek emergency help for:
New confusion, extreme drowsiness, fainting, or loss of consciousness
Repeated vomiting with an inability to keep fluids down
Severe weakness, collapse, chest pain, or a fast or irregular heartbeat
Signs of severe dehydration, such as very little urine and marked dizziness
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Arrange prompt medical assessment if you develop a new neck lump, persistent hoarseness, increasing thirst, frequent urination, worsening constipation, bone pain, kidney-stone symptoms, or unexplained weakness.
These symptoms have many possible causes, but blood calcium may need to be checked.
If you have been treated for parathyroid cancer, contact your care team promptly if previous symptoms return or blood tests show rising calcium or PTH.
These symptoms can occur with severely high calcium or another urgent condition.
3
Does any of this apply?
Book an appointment
Keep routine follow-up appointments even when you feel well.
And for anyone, someone who:
has noticed a lump, a mole that has changed, or unexplained weight loss
Every sign above is quoted from the sofidex article on Parathyroid cancer. If you are not sure, err upward — it is always reasonable to be checked.