Hello Ramu garu, we have excellent homeopathy remedies that will cure Blackened neck problems i.e., Acanthosis nigricans. It is a fairly common skin skin pigmentation disorder. Its signs are dark patches of skin with a thick, velvety texture. The affected areas of skin may also itch or have an odor. It’s caused by excessive growth of epidermal cells over these areas. Acanthosis nigricans risk factors include obesity, family history. Homeopathy is one of the best treatments for Acanthosis nigricans, it treats from the root and doesn’t cause any side-effects. Some indicated Homoeopathic remedies for Acanthosis Nigricans are Thuja, Sulphur, Arg.nit, Lycopodium. Sulphur, Ars.alb etc. Better to take doctors advice before taking medicines. Please call on +918885920000 for more details about medicines and online consultation. Stay Healthy with one of the “Best Homeopathic treatments” @ Dr. AnkiReddy’s clinic.