Lemon juice is good for acne, it helps to reduce oil sebum due to the drying effects and also reduces redness and inflammation that may help treat acne as well as leftovers scars. The lemon extract is antiseptic qualities, which may kill bacteria that lead to acne and pimples. Furthermore, citric acid, a type of alpha hydroxy acid (AHA), can help break down dead skin cells that lead to noninflammatory acne, pimples even blackheads.