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 or go to an emergency department if you have:
New or worsening difficulty breathing
Noisy breathing or a feeling that your airway is closing
Sudden major loss of vision
An inability to swallow saliva or clear food stuck in your throat
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
Seek urgent, same-day medical advice for a new painful or very red eye, blurred vision, light sensitivity, new hoarseness, worsening swallowing difficulty, or rapidly spreading blisters.
Fever or feeling significantly unwell while taking an immune-suppressing medicine also needs prompt assessment.
3
Does any of this apply?
Book an appointment
Arrange routine follow-up if sores are becoming more frequent, a new body area is affected, or treatment side effects are troubling you.
Keep planned eye and specialist appointments even when the condition appears quiet.
Every sign above is quoted from the sofidex article on Mucous membrane pemphigoid. If you are not sure, err upward — it is always reasonable to be checked.