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 help for:
Vomiting red blood or material that looks like coffee grounds
Black, sticky, tar-like stools, especially with weakness or dizziness
Sudden, severe, or steadily worsening abdominal pain
Fainting, confusion, clammy skin, or trouble breathing
A rigid or very tender abdomen
These can be signs of major bleeding or perforation.
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
Arrange prompt medical assessment if you have repeated vomiting, trouble swallowing, unexplained weight loss, ongoing loss of appetite, increasing tiredness, or persistent upper abdominal pain.
You should also seek advice if symptoms return after ulcer treatment.
3
Does any of this apply?
Book an appointment
Routine follow-up is important after H. pylori treatment, a stomach ulcer, or an ulcer linked to medicine you still need.
Keep taking prescribed treatment until you receive instructions to change it.
Every sign above is quoted from the sofidex article on Ulcers. If you are not sure, err upward — it is always reasonable to be checked.