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
These issues usually need planned advice rather than emergency care.
Call emergency services if your baby has severe or rapidly worsening breathing difficulty, becomes blue or unusually unresponsive, or appears seriously unwell.
These signs can have many causes and require immediate assessment.
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 prompt medical assessment if your baby:
Develops unexplained swelling or tenderness over an arm, leg, or rib
Stops moving one limb as much as usual
Cries consistently when a particular area is touched or moved
Develops a new bend, lump, or change in bone shape
Has an unexpected setback in feeding or growth
3
Does any of this apply?
Book an appointment
Arrange routine follow-up if your baby is due for growth checks, blood tests, or a review of milk fortification and supplements.
Contact the healthcare team if feeds or supplements are repeatedly missed, difficult to give, or causing concern.
The article also says
If a fracture is suspected, support the limb in the position you found it and avoid repeatedly checking its movement.
Every sign above is quoted from the sofidex article on Osteopenia - premature infants. If you are not sure, err upward — it is always reasonable to be checked.