To get rid of sweat pimples on your legs use an exfoliating cleanser to cleanse the skin really good and open up the pores in your skin and remove excess oil.
Then apply an over the counter acne cream that has the ingredients benzoyl peroxide or salicylic acid.
Apple Cider Vinegar kills bacteria so applying Apple Cider Vinegar to the sweat pimples can help clear the sweat pimples up and open up your skins pores as well.
Lemon Juice is another remedy for pimples and acne and you just apply the lemon juice to the acne or pimples including sweat pimples just like you would with the Apple Cider Vinegar.