Don't worry...you are suffering from acanthosis nigricans causing dark neck... Specific medicine available for good control... Treatment depends on the severity..Do direct online consultation for detailed prescription by sending photos.

u r probably suffering form a condition called Acanthosis nigricans. It is a skin condition that causes a dark discoloration in body folds and creases. It typically affects the armpits, groin and neck. Acanthosis nigricans is a skin condition characterised by areas of dark, velvety discoloration in body folds and creases. The affected skin can become thickened. This can occur co of Hormonal changes, Weight gain, insulin resistance and certain medication. Corroborate with pictures and consult a Dermatologist fort he same.