For the marks left by Pimples,u can try applying Neem leaves paste+a pinch of Turmeric powder over the face(spots),r mint leaves paste+Lemon juice drops daily 2 times n keep for 1/2 hr &wash with normal water.U can apply Alovera gel also for smoothening.It all depends on depth of Scars.If its too deep,then its difficult.But otherwise u can try these tips,ptovided lot of intake of water,fruits,nutritious diet,avoiding Fatty,oily,spicy stuff. In Homeopathy,there r both internal aswell extrnal medications which also help well for rt now c/o,n also to reduce recurrence.