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 for sudden severe or rapidly worsening abdominal pain, fainting, confusion, trouble breathing, a rigid or swollen abdomen, or signs of collapse.
These can be symptoms of internal bleeding, rupture, or severe infection.
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 prompt medical assessment for new, unexplained pain in the upper-left abdomen, especially when it is severe, persistent, associated with fever, or occurs after an injury.
Splenic infarction cannot be confirmed from symptoms alone.
Get urgent same-day help if you have a known splenic infarction and develop:
Increasing abdominal pain or tenderness
Fever, chills, or feeling progressively unwell
Repeated vomiting or difficulty keeping fluids down
New weakness, dizziness, or a racing heartbeat
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate when symptoms are stable or improving.
Use these appointments to review test results, the suspected cause, medicines, and whether the spleen is expected to keep normal function.
Every sign above is quoted from the sofidex article on Splenic infarction. If you are not sure, err upward — it is always reasonable to be checked.