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 severe breathing difficulty, blue-grey lips or skin, a seizure lasting several minutes, repeated seizures without recovery, collapse, or difficulty waking the child.
Timely assessment is needed, but emergency services are not usually necessary unless you are otherwise seriously unwell.
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 medical care for rapid breathing, worsening feeding, unusual drowsiness, a new widespread purple rash, or signs that a heart condition is becoming harder to manage.
If you are pregnant and have had close contact with someone who may have rubella, contact your maternity service or public health team promptly.
3
Does any of this apply?
Book an appointment
Arrange routine medical review if a child has:
Reduced response to sound or a change in hearing
New difficulty seeing, eye pain or an unusual white pupil
Slow weight gain, feeding difficulty or reduced stamina
Loss of a skill they previously had
Changes in thirst, urination, growth or energy that could indicate a hormone problem
Every sign above is quoted from the sofidex article on Expanded rubella syndrome. If you are not sure, err upward — it is always reasonable to be checked.