Does lemon juice helps in clearing acne and black marks?

No.: Not recognized to do anything for your skin.

No: Try using a good skin cleanser and follow up with a dermatologist.

No: Lemon juice can be irritating to the skin, however, and if you get sun exposure after getting lemon juice on the skin, it can cause a powerful reaction that can leave dark marks for months, called a phytophotodermatitis. For acne and black marks, i'd see a dermatologist to get you on a regimen that has a retinoid which can get you on track.