What is iron infusion skin staining?
Skin staining — also called cutaneous pigmentation — is a brownish discolouration of the skin that can occur after an iron infusion. It happens when a small amount of iron leaks from the vein into the surrounding tissue.
The staining can appear as a light brown patch near the cannula site, usually on the forearm or hand. It's usually cosmetic — it doesn't cause pain or health problems — but it can be persistent.
How common is it and what causes it?
Skin staining is uncommon, estimated to occur in less than 1% of iron infusions. The risk is low because accredited clinics use careful techniques and modern iron products are designed to minimise this risk.
The staining occurs when iron solution escapes from the vein into the surrounding tissue (extravasation). Risk factors include difficulty placing the cannula, small or fragile veins, or movement of the arm during the infusion.
How to reduce your risk
Choose an accredited clinic with experienced staff. Keep your arm still during the infusion, and tell the nurse immediately if you notice any pain, stinging, or swelling at the cannula site.
If staining does occur, it often fades gradually over months. While there's no guaranteed treatment to remove the pigment quickly, some clinics may recommend topical treatments or refer you to a dermatologist.
Related condition
Iron infusion / low iron →References & sources
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
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