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 if your child has a seizure, is very difficult to wake, develops sudden weakness, or has trouble breathing.
A ridge noticed after a significant head injury should be assessed according to the injury symptoms rather than assumed to be related to the suture.
Contact a healthcare professional promptly if the area becomes painful, red, warm, or swollen.
Those findings are not typical of a simple bony ridge and may have another cause.
Seek same-day medical care for repeated vomiting with a severe headache, unusual sleepiness, a persistent bulging soft spot, or a clear change in alertness.
These symptoms do not usually result from an isolated metopic ridge, but they need assessment.
Arrange a routine appointment with your child’s doctor if the ridge is prominent, the forehead looks triangular or narrow, or the head shape seems to be changing.
You should also book an assessment if you are concerned about head growth, vision, feeding, movement, or development.
Every sign above is quoted from the sofidex article on Metopic ridge. If you are not sure, err upward — it is always reasonable to be checked.