"i always had clear skin, then when i turned 19 my skin broke out mostly all over my chin, so many tiny &quot;under skin&quot; bumps and then big cystic red acne that wouldn&#039;t develop a head and took a long time to heal, after three months of my skin (chin) being completely destroyed with acne, my doctor prescribed duac. within a week my skin was completely clear. i did have dryness, so i made sure i washed my face with a gentle soap and an exfoliating brush in the morning and moisturized, then did the same at night before applying only a pea sized amount of duac to only my chin, where most of my spots appeared! it works amazing, but i would ensure i moisturized a lot with this product and only use the prescribed amount once a day."