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Wait, what is this rash?

Artem Fomytskyi Updated by Artem Fomytskyi

Although the majority of people will not experience a reaction to their natural deodorant, some people still will (hey, we’re all totally unique).  We can’t exactly diagnose the issue that you might be having so please consult your doctor and stop using Myro if you experience any of these common rashes. And in the meantime, here are some additional tips to avoid sensitivity.

Irritant contact dermatitis 

This is the most commonly occurring type of contact dermatitis. It can develop quickly when the skin touches an irritating ingredient, is rubbed too hard, or comes in contact with heat. Any of these can break through the skin barrier and can cause inflammation. This can feel itchy or tight, and in some cases even swell, blister or peel.

If you’re aware of a sensitivity to a particular ingredient, please check here to make sure Myro’s formula is right for you.

Allergic contact dermatitis

Unlike the irritant variety, with allergic contact dermatitis, the skin can take 48 to 96 hours to develop a reaction. The first time skin comes in contact with a new allergen, a piece of that allergen is stored and analyzed in the immune system’s memory bank, but doesn’t cause a reaction. After frequent contact, the immune system “remembers” the allergen and develops a red, itchy response (sometimes accompanied by hives, or darkened or peeling skin)—this could take days though. 


This chafing rash is likely to occur in areas of the body where skin folds over and rubs on itself, like under your arms. Heat, moisture and a lack of circulation are often to blame—and intertrigo can often be identified by raw, itchy (sometimes scaly) skin that burns or stings.

Please consult your doctor if you are experiencing anything that doesn’t feel quite right. Still have questions? Just contact our Customer Service team at and we’ll be happy to help.

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What are some tips to prevent sensitivity under my arms?