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 for trouble breathing, swelling of the face or throat, collapse, or another severe allergic reaction.
These are emergency symptoms rather than routine after-effects.
Contact the healthcare team promptly if pain continues to intensify after the first day or two, or if you develop increasing redness, warmth, swelling, drainage, fever, or chills.
These symptoms need assessment for infection.
Also seek prompt advice for marked bruising, ongoing bleeding, a sudden snap with new weakness, or blood glucose that remains difficult to control.
Mild soreness, a small bruise, or a brief flare without fever or spreading redness can usually be discussed during routine follow-up if it is improving.
Every sign above is quoted from the sofidex article on Steroid injections - tendon, bursa, joint. If you are not sure, err upward — it is always reasonable to be checked.