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 you develop:
Trouble breathing or an inability to swallow saliva
Sudden weakness or numbness on one side
A suddenly drooping face or difficulty speaking
Repeated whole-body jerking, loss of awareness, or a seizure
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 if twitching occurs with new or worsening muscle weakness, visible loss of muscle size, difficulty swallowing, or a clear change in walking or hand function.
These symptoms need urgent assessment even if the twitching seems mild.
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if the twitching lasts longer than two weeks, keeps returning, affects several areas, or is interfering with sleep or daily life.
You should also book an appointment if you have cramps, numbness, stiffness, unexplained weight loss, or concerns about a medicine.
Every sign above is quoted from the sofidex article on Muscle twitching. If you are not sure, err upward — it is always reasonable to be checked.