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Regarding your question

What is the treatment of pimples and dark spots?

1.Increase water intake
2.Eat healthy food and avoid irritants , oily or fatty food
3.Excercise regularly to open sweat pores
4.Ice cubes over the pimples
5.Over the counter medications like benzoyl peroxide 
6.Salicylic acid and sulfur
7.Skin lightening creams like olay on dark spots 
8.Constant face washing
9.Antibiotics
10.Laser therapy

What are the causes of pimples and dark spots?

1.Dehydaration
2.Oily skin in nature
3.Loss of melanin dye in dark spots
4.Acne
5.Closure of pores of the skin by bacteria or dead skin
6.sweat trap under skin

What are the investigations for pimples and dark spots?

1.Clinical assessment at the nearest medical center
2.Complete blood count 
3.Skin swab
4.Skin examination 
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