Acne scarring is generally caused by more severe cases of acne. Nodules under the skin—painful lumps or puss-filled cysts—are generally what create the worst cases of acne scars. These nodules are more likely to scar than other types of acne.
Most acne breakouts leave a red mark or hyperpigmented area on the skin after healing. This is normal, and the redness typically fades away after 6-12 months as the skin fully heals. If any traces of your acne scars are present after one year; however, it is considered a permanent acne scar.
Fortunately, there are a number of ways to treat acne scarring, depending on the type and severity of your condition. You should begin by meeting with a skin care specialist, preferably during the active stages of your acne. A reputable provider (i.e. a dermatologist or licensed skin care provider) should be able to recommend a proven acne scar treatment that's right for you.
Although severe acne scarring can be difficult to treat, you do have options. The best thing you can do for yourself and your skin is to meet with a specialist in your area for a consultation. He or she will analyze your skin to determine which treatment will be most effective for treating your acne scars.