Hi ,how are you ? Blackening around eyes now a days a very common occurring thing in woman but there are so many reasons have been found ,In many of my patients I have found following things
1. Lack of sleep ,late nights ,watching TV for long hours ,early morning awakening .
2. Hate for Milk ,dark green leaves vegetables
3. Mental tensions etc.
you will have to rectify your mistakes in above stated regards , certain medicines like Wonder Eye ,Eyederm lotion also effective in this case .
HCQS is a good drug to prevent hype pigmentation but under supervision of your dermatologist
,for diffuse hyper pigmentation there are many drugs . Peeling following skin lightning agents is a common phenomena .you may also opt for Glycolic acid
peel by your dermatologist .