Acanthosis nigricans represents increased skin thickness on the neck! It is often associated with insulin resistance, diabetes, and polycystic ovarian syndrome (PCOS) due to increased insulin-like growth factor (IGF) production. You may want to see your doctor first to make sure there is no underlying disease! Products Mentioned: https://www.amazon.com/shop/doctorly?listId=2FR1DKO1VCBHL The best treatments help to normalize the skin thickness by exfoliating or increasing cell turnover Retinoids, like differin gel, and exfoliants like amlactin are particularly helpful! **Affiliate Links Helps to Support the Channel**