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 urgent or emergency care for:
Severe trouble breathing or rapidly increasing neck swelling
Chest pain, fainting, or a very fast or irregular heartbeat with weakness or shortness of breath
Marked confusion, unusual sleepiness, very low body temperature, or inability to stay awake
Thoughts of self-harm or an immediate mental health crisis
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
Tell the care team promptly about pregnancy or plans to become pregnant.
These symptoms are not typical of stable autoimmune thyroiditis, but they require prompt assessment.
3
Does any of this apply?
Book an appointment
Routine follow-up focuses on symptoms, medication use, and TSH testing.
Contact the prescribing clinician if symptoms return, a dose is missed frequently, a new medicine or supplement is started, or the levothyroxine product changes.
Major weight changes can also affect hormone needs.
Arrange timely medical review for a new or enlarging neck lump, persistent hoarseness, trouble swallowing, new palpitations, unexplained weight change, or symptoms that continue despite normal thyroid tests.
These concerns are not always caused by autoimmune thyroiditis and may need separate evaluation.
Thyroid hormone requirements can change early in pregnancy, so testing should not be delayed until a routine annual visit.
Every sign above is quoted from the sofidex article on Autoimmune thyroiditis. If you are not sure, err upward — it is always reasonable to be checked.