Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services if you have signs of a severe infection, including:
Tell the emergency team that you have neutropenia and rheumatoid arthritis.
Contact your healthcare team promptly if infections are becoming more frequent, wounds are not healing, or you have new urinary, chest, dental, or skin symptoms.
A fever with neutropenia needs urgent medical assessment.
A temperature of 38°C (100.4°F) or higher is commonly treated as urgent, even when you otherwise feel reasonably well.
Do not wait for a routine appointment, because infection may progress without producing much redness, swelling, or pus.
Arrange routine follow-up if you notice more fatigue, new mouth ulcers, increased joint symptoms, easy bruising, or fullness beneath the left ribs.
These symptoms deserve assessment but are not usually emergencies by themselves.
Every sign above is quoted from the sofidex article on Felty syndrome. If you are not sure, err upward — it is always reasonable to be checked.