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
Get emergency help for sudden or severe persistent abdominal pain, especially with a hard or swollen belly, repeated vomiting, fainting, or an inability to pass stool or gas.
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 significant belly pain with fever, repeated vomiting, bloody stool, or marked abdominal swelling.
These symptoms can occur with a bowel blockage or another condition needing prompt assessment.
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if it lasts several weeks, is a clear change from normal, interferes with daily life, or does not improve after simple dietary changes.
You should also book an appointment if it comes with:
Unexplained weight loss or reduced appetite
Ongoing diarrhoea or constipation
Repeated or persistent belly pain
Blood in your stool
Greasy, unusually pale, or difficult-to-flush stools
Symptoms that regularly wake you from sleep
The article also says
Farting by itself is rarely an emergency.
Every sign above is quoted from the sofidex article on Farting. If you are not sure, err upward — it is always reasonable to be checked.