Extremely itchy rash under left breast and chest/stomach area

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What Causes a Rash on the Breast?

Weird rash appeared under my left breast. Skin around the area seems sensitive, but isn't red. Feel the same on my back too, but no rash there. Any idea what it is??

19 Causes Of Skin Redness and How to Treat It, According To Derms

Extremely itchy rash under left breast and chest/stomach area

Itchy breasts but no rash: 5 causes

Extremely itchy rash under left breast and chest/stomach area

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