What should you know about skin rash after steroid injection?

A small area of redness or tenderness near the injection site can result from local irritation. Itching, hives, or rash away from the site can indicate a medicine or antiseptic reaction. Increasing warmth, swelling, pain, discharge, or fever raises concern for infection. A pale or darker patch at the injection site can also occur after some steroid injections and should be documented for review. The rash itself does not identify the cause.

Take a clear photograph and note when the rash began, where it is, and whether it is spreading. Keep the area clean and avoid scratching, tight coverings, or applying new creams unless a clinician recommends them. Contact the injecting clinic for advice, particularly if the rash is enlarging or painful. Tell them about new medicines, soaps, dressings, and previous reactions.

Seek emergency help for breathing difficulty, throat tightness, faintness, facial swelling, or widespread hives. Get urgent medical assessment for rapidly spreading redness, severe pain, marked warmth, pus, fever, new weakness, or a limb that becomes cold or unusually pale. Do not wait for a routine appointment when these symptoms appear.

Ask what the rash most resembles, whether the injection or another exposure could be responsible, and which treatments are safe for you. Ask whether you should avoid this steroid or preparation in the future and how the reaction should be recorded.