Allergy to Iron Supplements
It’s possible to get a rash from an iron supplement, such as ferrous sulfate, an oral version of iron. Symptoms can include swollen, itchy, red, or burning skin.
An allergic reaction to iron supplements may also be triggered by other ingredients, such as tartrazine (a type of yellow food coloring), sulfites, or milk, soy, or wheat byproducts.
If you think you have an allergy to iron supplements, talk with your doctor. They can recommend allergy testing or prescribe a different supplement with fewer additives.
Can Anemia or Low Iron Cause Hives?
Many people who take iron supplements have a type of iron deficiency called anemia, or low levels of iron in the blood.
While iron supplements can trigger a rash for some people, others may experience hives or a rash from low iron.
An anemic rash can be itchy and usually appears as tiny red or purple dots on the skin, called petechiae.
Contact your doctor if you experience a rash due to iron deficiency. They may prescribe topical steroids or oral antihistamines to treat your symptoms. They may also suggest treatments to address the underlying cause of iron deficiency, such as supplements, dietary changes, or in some cases, a blood transfusion.
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