What's the best way to remove post acne scars? is there any side effects?

A few options: First, if the scar is red or swollen, use an over-the-counter cortisone cream to calm the skin. You can also do laser therapy or filler therapy, within one to three sessions, laser skin resurfacing using fractionated laser technology can even out the skin surface and increase new collagen formation to help fill in acne scars. Wear plenty of sunscreen, sun makes the scars worse. Hope this helped :].

Acne scar treatments: There are different types of acne scarsranging from broad flat to ice pick. The broad flat scars typically can be softened with fillers. Ice pick scars can be softened by punching them out and putting a graft of skin from behind the ear into the hole. Laser resurfacing or dermabrasion can then help to further improve the look.