Acne can cause red or brown discoloration and uneven skin contour. Usually multiple types of treatments are needed for maximum improvement. Patience is key since the full effect is often not seen for several months.
Skin discoloration and texture can be improved with topical treatments like hydroquinone and Retin-A, but for deeper scars and more significant discoloration, other techniques like resurfacing are needed.
Health Tips
You can refer : What Makes Your Skin Prone to Acne? Top 5 Causes of Acne" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/what-makes-your-skin-prone-to-acne-top-5-causes-of-acne-14523/post
"Teen Acne: What Helps, What Hurts!" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/teen-acne-what-helps-what-hurts-14525/post