There are plenty of creams available in the market that claim to get rid of pimple scars. You would have to use them for at least 3 months before seeing results. You could also use cleansers which have alpha hydroxyl acid. If you prefer to do it the natural way, try lemon juice or turmeric. They are good bleaching agents and will make the scars fade away. However, you would require a lot of patience as it’s a slow process. If you are really desperate, explore laser or microdermabrasion. Given the effort required to remove pimple scares, it makes sense to try and prevent pimples by taking good care of your skin.