Please choose the correct ending to complete the given sentence: Youth: [header] How to prevent acne scars [title] Treat acne early to avoid scarring. [step] If you have acne, the first step to preventing scarring is to get your acne under control with the appropriate treatment. This may seem obvious, but it's true.

Ending1: When a dark spot appears on your cheek, you probably have a dermatologist's prescription. Wait until your acne is most recent so your doctor can give the cream to go on your face. Ending2: The earlier you begin safe and effective treatment, the less chance of any skin damage or scarring. Take the time to go into your doctor or dermatologist's office to discuss your skin and the proper course of action. Ending3: Pimples come in many different shapes and sizes, and acne scars can turn out very noticeable within one week or two. Note that any scars that clog up potential pores or are dull and faded are considered blemishes and should be addressed. Ending4: Acne scars are caused by sun exposure, sexual activity, and you get a variety of chemicals such as impurities and antioxidants in your body, which can cause acne. Acne scars typically take about three to four weeks to go away.

Answer format: ending1/ending2/ending3/ending4