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:
Seek prompt medical advice for a new seizure, repeated unexplained staring or jerking episodes, loss of previously gained skills, worsening headaches, persistent vomiting, or a major change in alertness or behavior.
Routine follow-up should be tailored to symptoms and age.
Children commonly need developmental monitoring at regular health visits, with formal reassessment if parents, teachers, or clinicians notice new concerns.
Vision, hearing, growth, feeding, movement, learning, behavior, and seizure control may all need review.
Neurology follow-up is often appropriate for seizures, abnormal movements, significant muscle-tone differences, developmental regression, or complex MRI findings.
Genetics follow-up may be useful when testing changes over time or when a person is considering pregnancy.
Adults may benefit from reassessment when planning education, employment, transportation, finances, or independent living.
Routine questions about learning, behavior, therapies, or school supports can usually be addressed at scheduled follow-up visits.
The article also says
A clinician can provide an individualized seizure action plan when seizures are part of the condition.
Every sign above is quoted from the sofidex article on Agenesis of commissura magna cerebri. If you are not sure, err upward — it is always reasonable to be checked.