Dark mark under breast area

I just noticed a dark mark under my breast/above my rib cage area. Does anyone know what this might be or what would cause it? I know my ribs were hurting a…

11 Home Remedies To Get Rid Of Rashes Under The Breast

Dark mark under breast area

11 Home Remedies To Get Rid Of Rashes Under The Breast

11 Home Remedies To Get Rid Of Rashes Under The Breast

Acanthosis Nigricans: Treatment, Pictures, and Causes

Acanthosis Nigricans: Treatment, Pictures, and Causes

11 Home Remedies To Get Rid Of Rashes Under The Breast

Acanthosis Nigricans: Treatment, Pictures, and Causes

Acanthosis Nigricans: Treatment, Pictures, and Causes

Acanthosis Nigricans: Treatment, Pictures, and Causes

Acanthosis Nigricans: Treatment, Pictures, and Causes

11 Home Remedies To Get Rid Of Rashes Under The Breast

Acanthosis Nigricans (AN) Nationwide Children's Hospital