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
Seek emergency medical care now for a newly rigid abdomen that does not relax, particularly when it occurs with:
Severe, sudden, or rapidly worsening pain
Marked pain when the abdomen is touched
Fever, repeated vomiting, or increasing swelling
Inability to pass stool or gas
Fainting, confusion, severe weakness, or cold clammy skin
Blood in vomit or stool, or black tar-like stool
Recent abdominal injury or surgery
Possible pregnancy with pain, bleeding, dizziness, or fainting
Call emergency services if you feel faint, are confused, or are too unwell to travel safely.
Do not drive yourself in that situation.
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
And for anyone, someone who:
has abdominal pain that is severe, constant, or getting worse
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if the tightness is mild but keeps returning, lasts without improving, or is associated with ongoing constipation, a new lump, unexplained weight loss, or changes in bowel habits.
A clinician can check whether the sensation comes from the abdominal muscles, bloating, or another problem.
Every sign above is quoted from the sofidex article on Abdominal rigidity. If you are not sure, err upward — it is always reasonable to be checked.