Dr. BHB - identity rash under breast?

For about a week I've had this discolored area under my breast that itches and has bumps on it. I usually wear sports bras, I'm thinking maybe a sweat buildup…

Rash Under Breast: Causes, Treatment, and Prevention

DermTV - How to Treat Under Breast Rashes & Infections [DermTV.com Epi 190]

Rash Under Breast: Causes, Treatment, and Prevention

DermTV - How to Treat Under Breast Rashes & Infections [DermTV.com Epi 190]

Rash under breast: Causes, treatments, and more

Rash Under Breast: Causes, Symptoms, and Treatment Guide - PharmEasy Blog

Rash Under Breast (Interigo): Causes, Treatment, and More

Og autumn2014 (1)

Rash under breast: Causes, treatments, and more

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Frontiers The quantum leap in therapeutics for advanced ALK+ non-small cell lung cancer and pursuit to cure with precision medicine

Why Do I Have Rashes under the Breast?

Rash Under Breast: Causes, Treatment, and Prevention

Skin Concerns] please help? Skin chaffing under breast : r/SkincareAddiction