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Learn symptoms of an armpit rash, what causes it, how it’s diagnosed, and treatment options.

Sometimes your skin rash is serious and needs to be treated by a doctor so it’s important to know what to watch out for.

Where a rash appears on your body can provide important clues about whether it represents a harmless skin irritation or a symptom of something more serious that needs medical evaluation and treatment.

Mold spores can cause allergic skin reactions ranging from mild redness to severe rashes. Keeping indoor humidity levels between 30-50% and promptly fixing any water leaks helps prevent mold growth.

Start with over-the-counter treatments first, like a gentle moisturizer for dry skin, Hu says. And if the rash itches, use an over-the-counter cortisone cream for a week.

5 common skin rashes that can be caused by COVID, according to dermatologists Some viral illnesses are known to cause rashes, like hives.