Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for heavy or rapidly recurring bleeding, bleeding that does not stop with gentle direct pressure as instructed, trouble breathing, unresponsiveness, or a seizure.
These are emergency concerns rather than symptoms to wait on until a routine appointment.
And for anyone, someone who:
Contact the baby’s healthcare team promptly for increasing redness, warmth, swelling, drainage, odor, tenderness, or wound opening.
A fever in a young infant needs immediate medical advice.
Clear fluid leaking from a deep scalp lesion, a new bulge or pulsation, unusual sleepiness, poor feeding, repeated vomiting, or seizure-like movements also require urgent assessment.
And for anyone, someone who:
Routine follow-up checks whether the wound is closing, the dressing plan is working, and the baby is feeding and growing normally.
The healthcare team may photograph or measure the lesion to track healing.
Follow-up can also address scar care, hair loss, skull growth, and whether further imaging or surgery is needed.
Ask when bathing, tummy time, hats, car-seat head supports, and other routine activities are safe.
The article also says
Keep scheduled appointments even when the area appears better.
A thin layer of new skin may remain easy to injure.
Every sign above is quoted from the sofidex article on Aplasia cutis congenita. If you are not sure, err upward — it is always reasonable to be checked.