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
Call emergency services for high fever, confusion, collapse, severe agitation, chest pain, major breathing difficulty, or a very fast heartbeat with severe illness.
These symptoms may indicate thyroid storm or a heart complication.
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
Contact your treatment team promptly if symptoms return after improving, if you become pregnant or plan a pregnancy, or if you have new eye symptoms.
Pregnancy can affect treatment choices and monitoring.
Seek urgent medical care if:
You develop fever or a severe sore throat while taking antithyroid medicine
Your skin or eyes turn yellow while taking thyroid medicine
You have new double vision, worsening eye pain, or cannot close an eye
Your vision becomes blurred, dim, or less vivid
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if you develop possible symptoms of an overactive thyroid, such as a persistent fast heartbeat, shaking, heat intolerance, unexplained weight loss, or swelling at the front of the neck.
Every sign above is quoted from the sofidex article on Graves disease. If you are not sure, err upward — it is always reasonable to be checked.