Welcome to HealthcareMagic...
i understand your problem, use a good quality sunscreen before going out.
also use chandan/ sandalwood pack on your back regularly .
drink lots of water also eat ayurveda medicine : haridra khand, 1 tsf three times a day with milk.
if possible go to a panchakarma
center and get VIRECHANA therapy done.
dr. bhagwan dass