Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain dark circles can occur due to causes like: -Excessive stress. -Malnutrition. -Overuse of mobiles and laptops. -Sleep deprivation. -Allergies etc.. Secondary dark pigmentation over neck can be due to causes like Acanthosis Nigricans that is commonly seen in cases like hormonal imbalances, obesity etc.. For dark circles I would suggest you to first of all reduce stress by doing meditation and breathing exercises.. Take sufficient sleep.. Avoid excess use of gadgets.. You can start applying creams containing Kojic acid and Vitamin E and Kojivit can be suitable in this regard.... Grapeseed extract containing creams are helpful.. You can also put pieces of cucumber over the closed eyes as it has soothing effects.. You can also place grated potato over the eyes.. Take multivitamin supplements.. Drink plenty of water and take a nutritious diet.. In case of no improvement consult a Dermatologist and get evaluated and he can also advised lazer treatment for removing the dark circles.. For dark pigmentation over neck you can start using keratolytic agents like Salicylic acid facewash.. Apply retinoid containing creams like Adapelene.. Exfoliate the skin twice a week.. You can also use creams containing Hydroquinone, Tretinoin and Steroids like Mometasone but only under proper guidancne of Dermatologist.. You should also consult an Endocrinologist and get evaluated and a proper hormonal profile can be done to rule out the underlying cause and treated accordingly.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.