Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain darkening of skin complexion due to continuous exposure to sun is due t presence of harmful ultraviolet radiations in the sunlight that has damaging effect over the skin that leads to excess formation of melanin pigment under the skin leading to increased pigmentation..
I would suggest you to first of all start limiting excess sun exposure and if you are exposed always apply a sunscreen lotion and also cover your face with a scarf..
You should also start using
depigmentation creams and facewash like creams containing
Kojic acid,
glycolic acid and arbutin..
You can also apply Vitamin E gel at night..
You can take Vitamin C supplements..
Wash your face with facewash containing
Salicylic acid and glycolic acid..
You can also take steam and then gently scrub your face with a soft towel..
You can also go for treatments like Photofacial,
Microdermabrasion and chemical peeling..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora..