Problems with acne, some therapies?

i don't have bad acne I just get a few on my back and chest and they really bother me. I have sensitive skin so I'm constantly trying things and nothing seems to work. I noticed in summer though I barely have any pimples, so would a salt and water solution work? if I spray some on my skin everyday and let it dry or something? also.. I've heard if I put lemon juice in water and drink that often, it will clean my skin from the inside out.. will this work?
Problems with acne, some therapies?
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