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 emergency medical care if:
A baby younger than 3 months has a temperature of 38°C or higher
A baby with known severe neutropenia develops any fever under their care plan
The baby is difficult to wake, floppy, or not responding normally
Breathing is difficult, the lips look blue or grey, or there are pauses in breathing
The skin looks mottled, very pale, or unusually cold
There is a seizure or a rash that does not fade when pressed
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
A fever in a young infant needs prompt assessment even when neutropenia has not been confirmed.
Contact the baby’s medical team urgently the same day for a new fever in an older infant with neutropenia, worsening mouth sores, spreading skin redness, reduced feeding, repeated vomiting, or fewer wet nappies.
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate for repeat blood counts and discussion of growth, medicines, mild recurring infections, or a low ANC in a baby who otherwise appears well.
Keep scheduled testing even when the baby has no symptoms, because the pattern over time helps identify the cause.
Every sign above is quoted from the sofidex article on Neutropenia - infants. If you are not sure, err upward — it is always reasonable to be checked.