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
Get emergency help for:
A sudden severe or unusual headache
Confusion, fainting, weakness, difficulty speaking, or vision changes
Vomiting blood or coughing up a significant amount of blood
Black, tar-like bowel movements or substantial blood in urine
Heavy bleeding that continues despite firm pressure
Severe bleeding with dizziness, breathlessness, or collapse
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 assessment for bleeding that is difficult to stop, a significant injury, or a head injury when your platelet count is low.
These symptoms do not necessarily mean that ITP is the cause, but they need prompt assessment.
3
Does any of this apply?
Book an appointment
Arrange a routine medical review if you develop unexplained bruising, pinpoint skin spots, repeated nosebleeds, bleeding gums, or heavier periods.
You should also seek advice if known ITP symptoms are increasing, you are planning pregnancy or a procedure, or a new medicine has been recommended.
Every sign above is quoted from the sofidex article on Essential thrombocytopenia. If you are not sure, err upward — it is always reasonable to be checked.