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 difficulty breathing, inability to swallow saliva, fainting with gastrointestinal bleeding, or signs of bowel blockage.
Possible blockage symptoms include severe or worsening abdominal pain, repeated vomiting, marked abdominal swelling, or inability to pass stool or gas.
These symptoms have several possible causes.
They do not establish that lymphoid hyperplasia has become serious, but they need timely assessment.
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:
A rapidly enlarging, hard, or fixed lump
Unexplained weight loss, drenching night sweats, or persistent fever
Ongoing diarrhea, visible blood in the stool, or difficulty maintaining weight
New symptoms in someone with a weakened immune system
Increasing swallowing problems, snoring, or disrupted breathing during sleep
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment if you notice an unexplained lump, persistent digestive symptoms, or swelling that does not settle after an expected infection.
Follow-up is also appropriate if known lymphoid tissue is growing or causing increasing discomfort.
Every sign above is quoted from the sofidex article on Lymphoid hyperplasia. If you are not sure, err upward — it is always reasonable to be checked.