Thanks for writing to us.
It seems you had developed some kind of sun allergy
also known as polymorphous light eruptions.
With use of steroids
, the lesions have subsided. Normally the skin tends to regain its normal color on its own after couple of weeks. Kojic acid
is a pigmentation reducing cream and will not help the hypopigmented patch in regaining color.
Right now I will advise using a good sunscreen in morning and leaving the lesion as such for couple of weeks. If in case there is no change then you may start applying fluticasone
cream and tacrolimus cream to regain pigmentation.
Hope that helped