Since there are many causes of oily skin and the causes of acne breakouts, and the skin conditions at the beginning of the use of the anti-acne product are different, it is not possible to know the exact dates when the improvement will begin in a particular person. Usually azelaic acid is very effective in combination with other ingredients that correct the condition of the skin with acne (retinoids, salicylic acid, benzoyl peroxide). According to the practice of our customers, acne improvement occurs 2-4 months after the start of using a complex of anti-acne products.