Acanthosis Nigricans Causes & Symptoms Pigmentation Treatment FMS Skin & Hair Clinics Acanthosis Nigricans: Causes, Symptoms, Diagnosis & Treatment Acanthosis nigricans, also known as Dark neck black neck, is a skin condition that causes darker, thicker skin and that may feel velvety. It usually appears on the neck, folds of the Glutathione, 500 mg, 240 Capsules Can I use this lotion (prescribed for Acanthosis Nigricans) on my face pigmentation? : r IndianSkincareAddicts