question: daer sir , i am 18 years old and i have problem regarding blackheads and pimples . whenever i ride my bike lot of dust and pollution cause my face to pop up a pimples and blackheads . i have used many blood purifires , lacto calamine cream , facewashes and ep-ac soap.it shows there result but after some time pimples and blackheads again starts popping up ? will u please recommend me some advice ?