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 a seizure lasts five minutes or longer, unless the child's individual emergency plan gives different instructions.
Emergency help is also needed if seizures continue without the child recovering, breathing becomes difficult, the lips or skin turn blue or grey, there is a serious injury, or the child remains unusually unresponsive.
Follow the child's seizure plan and seek emergency help when the cluster is unusually prolonged or recovery is poor.
Seek urgent, same-day medical assessment if a baby has new, repeated movements that could be spasms.
This is especially important when the movements occur in clusters after waking or are accompanied by reduced interaction or loss of skills.
Also seek urgent advice if:
Medication questions, sleep problems, feeding concerns, therapy needs, and school planning can usually be discussed during routine follow-up unless there has been a sudden change.
The article also says
A typical cluster contains many very brief spasms, so its total length can be confusing.
Every sign above is quoted from the sofidex article on West syndrome. If you are not sure, err upward — it is always reasonable to be checked.