Is it normal to have dark velvety patches of skin on the back of the neck?
1. Introduction Having dark, velvety patches of skin on the back of the neck is not a normal variation of skin tone, but rather a specific clinical sign known in medicine as acanthosis nigricans. This distinct dermatological presentation serves as a visible external marker for underlying metabolic or endocrine dysfunction. The thickened, hyperpigmented skin typically … Read more