Acne scars are caused by damage to the skin tissue that occur only when an acne lesion (mud or similar) is deep and may have infection.
Treat Acne Fast
If possible acne treated as soon as possible. First try the natural treatments and cosmetic creams are homemade but if you do not work see a dermatologist.
Avoid get you pimples
Fight the urge to tighten. This may push the infection deeper levels in the skin and can break and cause tissue inflammation and cause infection.
It is better to use creams for acne or pimples and dry. Remember that the appearance of scar has a hereditary factor.