Movement - unpredictable or jerky: when to get help
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
Call emergency services if jerking:
Lasts five minutes or longer, or repeats without recovery
Happens with loss of awareness, breathing difficulty, or a serious injury
Starts with facial drooping, one-sided weakness, speech trouble, or sudden severe imbalance
Occurs for the first time as an apparent seizure
Happens during pregnancy or soon after giving birth with loss of awareness
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 same-day medical advice for new movements accompanied by fever, confusion, a severe headache, a stiff neck, repeated vomiting, or marked drowsiness.
You should also get prompt advice if movements begin after a medicine change, possible poisoning, recreational drug use, or sudden alcohol or sedative withdrawal.
And for anyone, someone who:
has a wound that is hot, spreading red, or leaking pus
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if movements keep returning, are getting worse, disturb sleep, or affect walking, eating, writing, work, or school.
Movements in a child should be assessed if they cause pain, injury, distress, or problems with daily activities.
The article also says
During a convulsive episode, move dangerous objects away and cushion the person’s head.
Do not hold them down or place anything in their mouth.
Time the episode and turn them onto their side when the jerking stops, if you can do so safely.
Every sign above is quoted from the sofidex article on Movement - unpredictable or jerky. If you are not sure, err upward — it is always reasonable to be checked.