Hi Archana,
No the cream does not cause skin darkening. Your skin probably requires maintenance peels for continued benefit along with strict sun protection. To this end I would recommend taking a skin lightening peel like SM peel or Glycolic Peel once a month for 6 months along with an SPF 50+, UVA +++ or higher sunscreen (e.g Melagard SPF 50, Rivela SPF 50) used 2-3 times a day. Hyclean TF does not provide enoough sun protection to prevent re-darkening. Also ask your doctor for a night cream ...
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