Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain dark pigmentation or marks over neck can be due to causes like
Acanthosis Nigricans that is commonly seen in cases like hormonal imbalances, obesity etc..
It generally does not go away completely and can be lightened by certain procedures and can be covered with makeup..
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 guidance 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.