When considering the application of azelaic acid, what is the optimal time one should incorporate this skincare product into their routine? Should it be utilized in the morning, following the cleansing and toning phases, or is it more efficacious when applied at night, allowing it to work synergistically with the skin’s natural reparative processes during sleep? Furthermore, how does one determine the required duration between azelaic acid application and subsequent products, such as moisturizers or sunscreens? Might the effectiveness vary depending on individual skin types or specific dermatological conditions? Could external factors like environmental stressors or lifestyle habits also play a significant role in dictating the timing? Additionally, is there a recommended frequency for application that would optimize the benefits of azelaic acid while minimizing potential irritation? Exploring these inquiries can illuminate the best practices for maximizing the therapeutic potential of this versatile ingredient in a skincare regimen.