Rash on my breast : r/skin

Does anybody know what these are? They hurt when touched and I didn't even realise I had them until earlier today. Is this serious? : r/bigboobproblems

What Is Under My Breast?

underboob rashes : r/bigboobproblems

What causes a rash that moves to different parts of the body?

Breast eczema: Symptoms, treatment, pictures, and more

Rash Under Breast: What Causes It and How to Treat It? (Including Prevention Tips) – Bellabeat

Inflammatory Breast Cancer: How to Spot It and What to Do About It

Breast Cancer Rash: What It Looks Like, How to Treat It

Rash under breast: Causes, treatments, and more

What to Know About Brown Spots on Breast and Breast Cancer